Detailed explanation of method examples for exchanging two data in java

java Method to exchange two data

1: Use an array, that is, first put the numbers to be exchanged in the array, for example, it may be used in some array sorting

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

2: By creating an object, the values ​​of two integers are introduced into the object to realize the exchange of two integers. Of course, if you want other basic data types, you only need to change the type in A.

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;
 }

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