JAVA基础：数组访问

 

package com.itheima.arry;

public class ArryDemo1 {
    public static void main(String[] args) {
        //掌握数组访问
        int[] ages=new int[]{12,52,630};
        //修改数组中数据
        ages[0]=66;
        ages[1]=100;
        System.out.println(ages[0]);
        System.out.println(ages[1]);
        System.out.println(ages[2]);

        //数组元素个数
        System.out.println(ages.length);
        //获取数组最大索引 总长度减一除了无元素情况
        int[] a=new int[]{};

        System.out.println(a.length);

    }
}