java-Java多態：用 Set的子類 模擬登陸注冊過程

Java多態：用 Set的子類 模擬登陸注冊過程

User.java

package com.qf.homework;

public class User implements Comparable{
private String userName;
private String passWord;
public User(String userName, String passWord) {
super();
this.userName = userName;
this.passWord = passWord;
}
public User() {
super();
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassWord() {
return passWord;
}
public void setPassWord(String passWord) {
this.passWord = passWord;
}
@Override
public int hashCode() {
return 10;
}
@Override
public boolean equals(Object obj) {
User u=(User)obj;
return this.userName.equals(u.userName)&&this.passWord.equals(u.passWord);
}

@Override
public String toString() {
    return "User [passWord=" + passWord + ", userName=" + userName + "]";
}
@Override
public int compareTo(User o) {
    if(this.userName.equals(o.userName)&&(this.passWord==o.passWord)){
        System.out.println("比較");
        return 0;

    }else
    {
        System.out.println("0.0");
        return 1;
    }


}

}

Test.java
package com.qf.homework;

import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;

public class Test {
public static void main(String[] args) {
Scanner in=new Scanner(System.in);
Set set=new TreeSet();
Set setR=new TreeSet();

while(true){
System.out.println("請你選擇你需要的功能: 1.登陸          2.注冊");
int c1=in.nextInt();//接收選擇的數字
if(c1==1){

    System.out.println("請輸入你的用戶名：");
    String loginUser = in.next();//接收用戶名
    System.out.println("請輸入你的密碼：");
    String loginpwd=in.next();//接收密碼
    User user=new User(loginUser,loginpwd);
    System.out.println(setR.contains(loginUser));
    if(setR.contains(loginUser))
    {
        System.out.println(set.contains(user));
        System.out.println(set);
       if(set.contains(user))
       {
           System.out.println("登陸成功！");//判斷用戶是否可以登陸
       }
       else
       {
           System.out.println("登陸失敗！");
       }
    }
    else
    {
        System.out.println("登陸失敗！");
    }
}else if(c1==2)
{
    User user2=new User();
    System.out.println("請輸入你想要注冊的用戶名");
    String  rUser=in.next();
    if(setR.add(rUser))
    {
        System.out.println("請輸入你想要注冊的密碼");
        String rPwd=in.next();
        user2.setUserName(rUser);
        user2.setPassWord(rPwd);
        set.add(user2);
        System.out.println("注冊成功");
        System.out.println(set);
    }
    else
    {
        System.out.println("注冊失敗 不能有相同的用戶名！！！");
    }



}else
{
    System.out.println("輸入有誤，請你重新選擇！！！！");
}
}

}
}

最佳回答：

解決了
public int compareTo(User o) {
int m=this.userName.compareTo(o.userName);
int n=this.passWord.compareTo(o.passWord);
if(m==0&n==0)
{
return 0;
}
return -1;

}