Java数组---选择排序＞升序与降序 | CSDN独创

int[] arr={71,54,58,29,31,78,2,77,87};

//选择排序前,先循环打印数组元素
System.out.print("排序前:");
for (int i=0;i arr[j]) {
            int rec = arr[i];
            arr[i] = arr[j];
            arr[j] = rec;
        }
    }
}
System.out.print("排序后");
for (int i = 0; i < arr.length; i++) {
    System.out.print(arr[i] + " ");
}