reverse 数组倒置输出

public class Reverse {
public static void main(String[] args) {
int arr[]={1,2,3};
int start=0;
int end=arr.length;
int temp;
int start=arr[start];
int end=arr[arr.length];
while(start!=end){
start++;
end--;
temp=arr[s];
arr[start]=arr[end];
arr[end]=temp;

    }
    for(int a:arr){
        System.out.println(a);
    }
}

}

应该是：int end=arr.length-1吧，要不然数组越界额