java 交换两个数据的方法实例详解

public static void swap2(int[] arr,int a,int b){
 int temp =arr[a];
 arr[a] = arr[b];
 arr[b] = temp;
 }

public static void swap(Object obj1,Object obj2){
 int temp;
 A a =(A) obj1;
 A b =(A) obj2;
 temp = a.n;
 a.n = b.n;
 b.n = temp;
 }