java 数组逆排序

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package lianxi;

import java.util.Arrays;

public class PaiXu {
public static void main(String[]args){

  int []a=new int[]{
     (int)(Math.random()*1000),
     (int)(Math.random()*1000),
     (int)(Math.random()*1000),
     (int)(Math.random()*1000),
     (int)(Math.random()*1000),
     (int)(Math.random()*1000),
     (int)(Math.random()*1000),
     (int)(Math.random()*1000)
  };

  System.out.println(Arrays.toString(a));
  swap(a);
  System.out.println(Arrays.toString(a));

}
public static void swap(int [] a){

  for(int i=0;i<a.length/2;i++){
   int temp=a[i];
   a[i]=a[a.length-1-i];
   a[a.length-1-i]=temp;
  }
}