public class Example22 {
    public static void main(String[] agrs){
        int[] arr;
        arr = new int[3];
        System.out.println("arr[0]=" + arr[0]);
        System.out.println("arr[1]=" + arr[1]);
        System.out.println("arr[2]= "+ arr[2]);
        System.out.println("数组的长度是：" + arr.length);
    }
}
