login.java

用Java编写的基于Socket的聊天室小程序！

//package chatRoom;
import java.util.*;
import java.awt.*;
import java.awt.event.*;

public class Login extends Frame implements ActionListener{

	Frame f;
	Button b1,b2;
	TextField tf1,tf2;
	Label l1,l2;
    Map UserMap;

	public void display(){
	    UserMap=new HashMap();
		f=new Frame("登陆聊天室");
		f.setSize(260,100);
		f.setLocation(320,240);
		f.setBackground(Color.pink);
		f.setLayout(new FlowLayout(FlowLayout.LEFT));
		b1=new Button("注册");
		b2=new Button("登录");
		tf1=new TextField(15);
		tf2=new TextField(15);
		tf1.setEditable(true);
		tf2.setEditable(true);
		tf2.setEchoChar('*');
		l1=new Label("用户名");
		l2=new Label("密    码");
		f.add(l1);
		f.add(tf1);
		f.add(b2);
		f.add(l2);
		f.add(tf2);
		f.add(b1);
		b1.addActionListener(this);
		b2.addActionListener(this);
		f.addWindowListener(new WinClose());
		f.setVisible(true);
	}
	public void actionPerformed(ActionEvent e){
		if(e.getSource()==b1){
            String s1,s2;
            s1=tf1.getText();
            s2=tf2.getText();
            UserMap.put(s1,s2);
//            System.out.println(UserMap.size());
        }
		else if(e.getSource()==b2){
            String s1,s2;
            s1=tf1.getText();
            s2=tf2.getText();
            if(UserMap.containsKey(s1)&&UserMap.containsValue(s2)){ //此判断条件有误
                System.out.println("登录成功！！");
            }
            else  if(！UserMap.containsKey(s1)）
                System.out.println("您还没有注册，暂时无法登录笨系统！");
        }

	}

	public static void main(String[] args) {
		(new Login()).display();
	}
}