黑马程序员———基本数据类型对象包装类

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<div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>package</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">cn.itcast.String;</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">/*</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> <strong>基本数据类型对象包装类。</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> 基本数据类型   引用数据类型</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> byte           Byte</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> short          Short</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> </span><span style="font-size: 12pt;">int</span><span> </span><span style="font-size: 12pt;">           Integer</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> long           Long</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> boolean        Boolean</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> double         Double</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> float          Float</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> char           Char</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> </span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> 基本数据类型对象包装类最常见作用：</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     <strong>就是用于基本数据类型和字符串类型之间做转换。</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     </span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     基本数据类型转成字符串。</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           基本数据类型+"";</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           <strong>基本数据类型.toString(基本数据类型值);</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           如：<strong>Integer.toString(34);</strong>//将34变成"34";</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     字符串转成基本数据类型。</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           如：在网页上的文本框获得年龄的字符串形式"23";要转成基本数据类型，来判断是否满18岁。</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           <strong>静态调用方式：</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span><span> </span><strong><span style="font-size: 12pt;"><u>xxx</u></span><span> </span><span style="font-size: 12pt;">a = Xxx.parseXxx(String);</span></strong></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span><span> </span><span style="font-size: 12pt;"><u>int</u></span><span> </span><span style="font-size: 12pt;">a = Integer.parseInt("123");</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           double d = Double.parseDouble("23.33");</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           boolean b = Boolean.parseBoolean("true");</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           <strong>对象调用方式：</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           Integer i = new Integer("234");</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span><span> </span><span style="font-size: 12pt;"><u>int</u></span><span> </span><span style="font-size: 12pt;"><u>num</u></span><span> </span><span style="font-size: 12pt;">= i.intValue();</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     </span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     <strong>十进制转成其他进制：</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>           二进制：toBinaryString();</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>           十六进制：toHexString();</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>           八进制：toOctalString();</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>           </strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>     其他进制转成十进制：</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>           parseInt(string,radix);</strong></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> */</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>public</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>class</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">IntegerDemo</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">{</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     </span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>public</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>static</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>void</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>main</strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">String</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">[]</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">args</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">)</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     {</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//整数类型的最大值</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">System</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>out</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">println</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"int max: "</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>MAX_VALUE</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">);</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     </span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//将一个字符串转成整数。</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>int</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>num</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><em>parseInt</em></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"123"</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">);</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">System</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>out</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">println</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"num = "</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">num</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">4</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">));</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//127</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     </span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//long l = Long.parseLong("22l");//数组格式异常：NumberFormatException</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//System.out.println(l);</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">System</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>out</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">println</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><em>toBinaryString</em></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">6</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">));</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//110</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>int</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>x</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><em>parseInt</em></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"110"</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">,</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">2</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">);</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>int</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>y</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><em>parseInt</em></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"3c"</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">,</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">16</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">);</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">System</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>out</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">println</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"x = "</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">x</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">);</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//6</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">System</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>out</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">println</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"y = "</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">y</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">);</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//60</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     }</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">}</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;"></span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="font-family:Consolas;"><span style="font-size: 12pt;">================================================================================</span></span></div><div align="left" style="color: rgb(0, 0, 0); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>package</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">cn.itcast.String;</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;"></span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">/*</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> Integer i = new Integer("234");</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span><span> </span><span style="font-size: 12pt;"><u>int</u></span><span> </span><span style="font-size: 12pt;"><u>num</u></span><span> </span><span style="font-size: 12pt;">= i.intValue();</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;"> */</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>public</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>class</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">IntegerDemo1</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">{</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     </span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>public</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>static</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>void</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>main</strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">String</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">[]</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">args</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">)</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     {</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt; background-color: rgb(156, 114, 3);"><strong>x</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>new</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">4</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">);</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>y</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">4</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">;</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//自动装箱。//new Integer(4);</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">y</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">y</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">3</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">;</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">/*y+3:y进行了<strong>自动拆箱</strong>，变成了</span><span> </span><span style="font-size: 12pt;"><u>int</u></span><span style="font-size: 12pt;">类型和2进行加法运算。</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">                          再将和进行装箱赋给y。</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">                          y+3中的y--><strong>y.intValue()</strong>;</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">                          注意的是Integer y = null若出现的这种情况，要进行判断，才能继续*/</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>m</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">128</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">;</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>n</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">128</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">;</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">System</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>out</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">println</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"m==n: "</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">m</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">==</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">n</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">));</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//false</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>a</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">127</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">;</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>b</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">127</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">;</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">System</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>out</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">println</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"a==b: "</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">a</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">==</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">b</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">));</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//true</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">/*</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">            因为a和b指向了同一个Integer对象。</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">            因为当数值在byte范围内容，对于新特性，如果该数值已经存在，则不会开辟新的空间。</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">            */</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     </span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     }</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     </span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     </span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>public</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>static</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>void</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>method</strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">()</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     {</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>x</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>new</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"234"</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">);</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>y</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">=</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong>new</strong></span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">Integer</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">234</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">);</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">           </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">System</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>out</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">println</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"x==y:"</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">x</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">==</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">y</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">));</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//false,因为是两个不同的对象。</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">          </span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">System</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;"><strong><em>out</em></strong></span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">println</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">"x.equals(y):"</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">+</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">x</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">.</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">equals</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">(</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">y</span></span><span> </span><span style="font-family:Consolas;"><span style="font-size: 12pt;">));</span></span><span style="font-family:Consolas;"><span style="font-size: 12pt;">//true，比较的是不同对象的值。</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">     }</span></span></div><div align="left"><span style="font-family:Consolas;"><span style="font-size: 12pt;">}</span></span></div></div></div>

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