175、有数组a[n]，用java代码将数组元素顺序颠倒
//用下面的也可以
//for(int i=0,int j=a.length-1;i<j;i++,j--) 是否等效于 for(int i=0;i<a.length/2;i++)呢？
import java.util.Arrays;
public class SwapDemo{
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)
};
System.out.println(a);
System.out.println(Arrays.toString(a));
swap(a);
System.out.println(Arrays.toString(a));
}
public static void swap(int a[]){
int len = a.length;
for(int i=0;i<len/2;i++){
int tmp = a;
a = a[len-1-i];
a[len-1-i] = tmp;
}
}
}
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