Add department in javaEE department management system, display department small demo practice hands

package Demoday02;

import java.util.Scanner;

public class Demo03addelements {
    public static void main(String args[]){
        boolean flag=true;
        int chs;
//        String departmentName;
        Scanner input =new Scanner(System.in);
        String[] departments = {"人事部","宣传部","咨询部","教科部"};
        do {
            System.out.println("==================================");
            System.out.println("部门管理");
            System.out.println("\t1.部门列表");
            System.out.println("\t2.添加部门");
            System.out.println("\t3.删除部门");
            System.out.println("\t0.退出系统");
            System.out.println("==================================");
            System.out.print("请选择功能");
            chs =input.nextInt();
            switch (chs){
                case 1:
                    System.out.println("=============================");
                    for (int i=0;i<departments.length;i++){
                        System.out.println(departments[i]);
                    }
                    break;
//                    "人事部","宣传部","咨询部","教科部"
                case 2:
                    System.out.println("=============================");
                    System.out.print("请输入你想添加的部门：");
                    String departmentName=input.next();
                    String []temps= new String[departments.length+1];//声明一个长度为1+n的临时数组
                    for (int i=0;i<departments.length;i++){
                        temps[i]=departments[i];
                    }
//                        temps[departments.length]=departmentName;
                    departments=temps;
                    temps=null;
                    departments[departments.length-1]=departmentName;
                    System.out.println("添加部门成功");
                    break;
              // case 3://
               // case 4://



            }
        }while (true);

    }
}