数组的定义,初始化

package com.itheima.array;

import org.w3c.dom.ls.LSOutput;

import java.sql.SQLOutput;


public class Demo1array {
    public static void main(String[] args) {
        int[] arr = new int[5];
        System.out.println(arr);//[I@5acf9800  变量的内存地址
        System.out.println(arr[0]);
        System.out.println(arr[1]);
        System.out.println(arr[2]);
        System.out.println("----------");
        arr[0]=11;
        arr[1]=12;
        arr[2]=13;
        System.out.println(arr[0]);
        System.out.println(arr[1]);
        System.out.println(arr[2]);

        int[] arr2=arr;
        arr2[0]=33;
        System.out.println("-----arr[0]-----");
        System.out.println(arr[0]);
        System.out.println("-----arr2[0]-----");
        System.out.println(arr2[0]);



        int[] arr3=new int[]{11,22,33};
        System.out.println("-------arr3-------");
        System.out.println(arr3[0]);
        System.out.println(arr3[1]);
        System.out.println(arr3[2]);

        int[] arr4={44,55,66};
        System.out.println("-------arr4-------");
        System.out.println(arr4);
        System.out.println(arr4[0]);
        System.out.println(arr4[1]);
        System.out.println(arr4[2]);

        System.out.println("-------cArr-------");
        char[] cArr=new  char[5];
        System.out.println(cArr);
        System.out.println("-------bArr-------");
        byte[] bArr=new  byte[5];
        System.out.println(bArr);
        System.out.println(bArr[4]);

        bArr=null;//空
        //System.out.println(bArr[0]);


        int[] larr={11,22,33,44,55};
        System.out.println("-----------larr----------");
        for (int i=0;i