数组

public class ArrayDemo3{
    public static void main(String[] args){
        //定义数组  并同时赋值
        int[] arr=new int[]{3,4,5,8,2};
        System.out.println(arr.length);
        System.out.println(arr[arr.length-1]);
        
        //定义数组直接用大括号赋值
        int[] arr1={22,56,89};
        System.out.println(arr1[arr1.length-1]);
        //为数组赋值
        arr1[2]=111;
        System.out.println(arr1[arr1.length-1]);
    }
}