java学习之旅63常用类_包装类_Integer_Number_JDK源码分析

1. 包装类的作用
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     public class TestWrapClass {public static void main(String[] args) {Integer i = new Integer(12);//打印Integer的最大值与最小值System.out.println(Integer.MAX_VALUE+","+Integer.MIN_VALUE);;//将字符串转换为整数int num = Integer.valueOf("123");System.out.println(num+10);//将整数转换为字符串//String s = 123+"";String s = Integer.toString(123);System.out.println(s);//转为16进制String ss = Integer.toHexString(i);System.out.println(ss);}}

     
     
     
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