Java控制台版学生管理系统如何实现高效操作？

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javapackage jxnd;

import java.util.ArrayList;import java.util.List;

public class StudentManager implements Manager { static List flist=new ArrayList();

public static void main(String[] args) { flist.add(new Student()); }}

package jxnd; import java.util.ArrayList; import java.util.List; import javax.tools.Tool; public class StudentManager implements Manager { static List flist=new ArrayList (); // static{ // flist.add(new Friend("1000","jiejei","1001","五五开", "456421", "男", 24, "13012345501","深圳")); // flist.add(new Friend("1000","wuwukai","1006","卢本伟", "456421", "男", 24, "13012345501","深圳")); // } private int index=0; @Override public void login() { Tools.load(); Tools.fload(); int i=0; if(verification(Tools.getString("请输入用户名字："), Tools.getString("请输入登入密码"))){ while (i<3) { Tools.menuFactory("修改密码,查询同学信息,查询所有好友信息,添加好友,删除好友,返回上一层"); switch(Tools.getint("请输入操作序列号：")){ case 1: UpdatePassword(); break; case 2: SelectStumenu(); break; case 3: SelectFriAll(); break; case 4: AddFriend(); break; case 5: DeleteFri(); break; case 6: return; case 0: Tools.save(); Tools.fsave(); System.exit(0); } } i++; } } private void DeleteFri() { String s=Tools.getString("请输入您要删除的好友ID："); for(int i=0;i x&&stu.getAge() =0){ System.out.println(stu); } } } private void SelectStuName() { String s=Tools.getString("请输入要查询的名字："); for(Student stu:TeacherManager.list){ if(stu.getName().indexOf(s)>=0){ System.out.println(stu); } } } private void SelectStuID() { String s=Tools.getString("请输入要查询的ID编号："); for(int i=0;i 0){ return true; } else{ Tools.p("您输入的用户名或密码有误！"); return false; } } }