Android基本数据类型测试

来源：互联网发布：剑三捏脸数据怎么清洗编辑：程序博客网时间：2024/05/22 12:33

    /*
     * 在界面按钮上设置了 onClick="doClick"，
     * 每一次点击按钮时，都会执行这个方法
     */
    public void doClick(View view) {
       byte a = -128;
       byte b = 127;

       // 10000000 00000000
       short c = -0x8000;
       // 01111111 11111111
       short d = 0x7FFF;

       int e = -0x80000000;
       int f = 0x7FFFFFFF;

       long g = -0x8000000000000000L;
       long h = 0x7FFFFFFFFFFFFFFFL;

       // 获得界面的文本控件对象
       // 在文本控件中显示上面几个变量的值

       TextView tv =
               (TextView)
               findViewById(R.id.textView1);

       tv.setText(String.valueOf(a));
       tv.append("\n"+b);
       tv.append("\n"+c);
       tv.append("\n"+d);
       tv.append("\n"+e);
       tv.append("\n"+f);
       tv.append("\n"+g);
       tv.append("\n"+h);
       ////
       float i = Float.MAX_VALUE;
       float j = Float.MIN_VALUE;
       double l = Double.MAX_VALUE;
       double m = Double.MIN_VALUE;
       tv.append("\n"+i);
       tv.append("\n"+j);
       tv.append("\n"+l);
       tv.append("\n"+m);
       ////
       char n = 'a';
       char o = 97;
       char p = '\u0061';
       char q = '\u4e00';
       tv.append("\n"+n);
       tv.append("\n"+o);
       tv.append("\n"+p);
       tv.append("\n"+q);
    }

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