[上]JAVA学习系列模块五第二章103.数组操作_存储数据

[上]JAVA学习系列模块五第二章103.数组操作_存储数据

视频

[vbilibili]【尚硅谷2024最新JAVA入门视频教程（上部）JAVA零基础入门教程】 https://www.bilibili.com/video/BV1YT4y1H7YM/?p=103&share_source=copy_web&vd_source=85f561e7442caa320f4a23b57edee129[/vbilibili]

笔记

存储元素

public class Demo02Array {
    public static void main(String[] args) {
        int[] arr = new int[3];
        arr[0] = 100;//将100存到了arr这个数组的0索引上
        arr[1] = 200;//将200存到了arr这个数组的1索引上
        arr[2] = 300;//将300存到了arr这个数组的2索引上
        //arr[3] = 1000;

        System.out.println("============================");
        
        String[] arr1 = new String[3];
        arr1[0] = "东方不败";
        arr1[1] = "岳不群";
        arr1[2] = "林平之";
    }
}

public class Demo03Array {
    public static void main(String[] args) {
        //键盘录入三个整数,存储到数组中
        int[] arr = new int[3];

        Scanner sc = new Scanner(System.in);

        /*
          先看等号右边的,先录入,将录入的数据保存到指定的索引位置上
         */
      /*  arr[0] = sc.nextInt();
        arr[1] = sc.nextInt();
        arr[2] = sc.nextInt();*/

       /* for (int i = 0; i < 3; i++) {
            arr[i] = sc.nextInt();
        }*/
        
        for (int i = 0; i < arr.length; i++) {
            arr[i] = sc.nextInt();
        }
        
    }
}

public class Demo04Array {
    public static void main(String[] args) {
        //定义一个长度为3的数组
        int[] arr = new int[3];
        Random rd = new Random();

        //arr[0] = rd.nextInt(10);
        //arr[1] = rd.nextInt(10);
        //arr[2] = rd.nextInt(10);

        for (int i = 0;i