Integer

 1 public static int max(int a, int b) {
 2         return Math.max(a, b);
 3     }
 4 
 5 
 6 /**
 7  *Math 的max方法
 8  */
 9  public static int max(int a, int b) {
10         return (a >= b) ? a : b;
11     }

1 public static int sum(int a, int b) {
2         return a + b;
3     }

1  
2 private final int value;
3 
4 public int intValue() {
5         return value;
6     }

1 int MIN_VALUE = 0x80000000;
2 int MAX_VALUE = 0x7fffffff;