自定义泛型

package com.generic;

import java.util.Arrays;

//自定义泛型  优点显而易见 方法复用性高  不必因为类型不同而重复编写
public class Zdyfx {
public static void main(String[] args) {
	String[] arr = new String[]{"aa","bb","cc","dd"};
	change(arr,1,3);
	System.out.println(Arrays.toString(arr));
	
	Integer[] integer = new Integer[]{11,22,33,44,55};
	change(arr,1,3);
	System.out.println(Arrays.toString(integer));
}

public static <T>  void change(T[] arr, int idx1, int idx2) {
	T temp = arr[idx1];
	arr[idx1] = arr[idx2];
	arr[idx2] = temp;
}
}