数组首尾替换

`public static void main(String[] args) {
// 数组首尾替换
int a[] = {15,3,7,4,6,1,8};
int start = 0;
int end = a.length-1;
for(;start < end; start++,end--){
int temp = a[start];
a[start] = a[end];
a[end] = temp;
}
for (int i = 0; i < a.length; i++) {
System.out.print(a[i]);
}

}`