java自定义泛型 面试题：接收任意数组进行反转

package com.swift.fanxing;

import org.junit.Test;

public class RenyiReverse {
    @Test
    public void test() {
        int arr[]=new int[] {1,10,6,9,2};
        reverse(arr);
    }
    
    public void reverse(int[] arr) {
        
        for(int i=0;i<arr.length/2;i++) {
            
            int temp=arr[i];
            arr[i]=arr[arr.length-1-i];
            arr[arr.length-1-i]=temp;
        }
        
        for(int x:arr) {
            System.out.println(x);
        }
    }
}

package com.swift.fanxing;

import org.junit.Test;

public class RenyiReverse {
    @Test
    public void test() {
        Integer arr[]=new Integer[] {1,10,6,9,2};//这里注意不能使用int 替代Integer
        String arr2[]=new String[] {"aa","bb","cc","dd","ee"};
        reverse(arr);
        reverse(arr2);
    }
    
    public <T> void reverse(T[] arr) {
        
        for(int i=0;i<arr.length/2;i++) {
            
            T temp=arr[i];
            arr[i]=arr[arr.length-1-i];
            arr[arr.length-1-i]=temp;
        }
        
        for(T x:arr) {
            System.out.println(x);
        }
    }
}