userpack.java

java版QQ聊天,实现用户登录验证

package com.qq;

import java.util.*;
import java.lang.*;



public class UserPack implements java.lang.Comparable
{
	private String ClientUserName;
	private String ClientUserAddress;
	private String ClientUserPassword;

	
	UserPack(String ClientUserName,String ClientUserAddress,String ClientUserPassword)
	{
		if(ClientUserName==null || ClientUserAddress==null || ClientUserPassword==null)
		{
			throw new NullPointerException();			
		}
		else
		{
			this.ClientUserName = ClientUserName;
			this.ClientUserAddress = ClientUserAddress;
			this.ClientUserPassword = ClientUserPassword;
		}
		
	}
	
	public String getClientUserName()
	{
		return this.ClientUserName;
	}

	public String getClientUserAddress()
	{
		return this.ClientUserAddress;
	}
	
	public String getClientUserPassword()
	{
		return this.ClientUserPassword;
	}
	
	public int compareTo(Object o)
	{
		UserPack s = (UserPack) o;
		int last = ClientUserAddress.compareTo(s.ClientUserAddress);
		return (last != 0 ? last : ClientUserName.compareTo(s.ClientUserName));		
		
	}
	
	public String toString()
	{
		return ClientUserName + " " +ClientUserAddress + " " + ClientUserPassword;
	}
}