数组反转，求解该怎么改

Question

public class d9 {
public static void main(String[] args) {
int[] arr = {19, 28, 37, 46, 50};

    //循环遍历数组
    /*for (int start=0,end=arr.length-1;start<=end;start++,end--){
        //变量交换
        int temp = arr[start];
        arr[start] = arr[end];
        arr[end] = temp;*/
}


reverse(arr);
//遍历数组
printarray(arr);

}
public static void reverse(int[] arr) {
for (int start = 0, end = arr.length - 1; start <= end; start++, end--) {
//变量交换
int temp = arr[start];
arr[start] = arr[end];
arr[end] = temp;

}

}

public static void printarray(int[] arr){
    System.out.print("[");
    for(int x=0;x< arr.length;x++){
        if (x== arr.length-1){
            System.out.print(arr[x]);
        }else{
            System.out.print(arr[x] + ",");
        }
    }
    System.out.print("]");
}

}

求解怎么改

Answer 1

  public static void main(String[] args) {
        int[] i=new int[]{1,2,3,4,5};
        reverse(i,0,5);
        System.out.println(JSON.toJSONString(i));
    }
    public static void reverse(final int[] array, final int startIndexInclusive, final int endIndexExclusive) {
        if (array == null) {
            return;
        }
        int i = Math.max(startIndexInclusive, 0);
        int j = Math.min(array.length, endIndexExclusive) - 1;
        int tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }