loginwindow.java

适合初学着学习java 通讯

package com.lovo.event;

import java.awt.Container;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.net.ServerSocket;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class LoginWindow extends JFrame{

	
	public void init()
	{    //界面窗口
		
		this.setSize(400, 300);
		this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
		this.setTitle("登陆");
		this.setLocationRelativeTo(null);
	}
	//成员变量
	JTextField userText;
	JPasswordField userPwdText;
	JButton button1;
	JButton button2;
	int port = 0;
	public LoginWindow()
	{  //具体设置
		init();
		
		Container contentPane = this.getContentPane();
		contentPane.setLayout(null);
		
		JLabel jl1 = new JLabel();
		jl1.setText("用户名:");
		jl1.setBounds(new Rectangle(94, 98, 42, 15));
		
		userText = new JTextField();
		userText.setBounds(162, 98, 81, 21);
		
		JLabel jl2 = new JLabel();
		jl2.setText("密 码:");
		jl2.setBounds(new Rectangle(94, 146, 42, 15));
		
		userPwdText = new JPasswordField();
		userPwdText.setBounds(new Rectangle(162, 146, 81, 25));
		
		button1 = new JButton();
		button1.setBounds(new Rectangle(108, 210, 63, 25));
		button1.addActionListener(new ActionListener()
		{//事件监听
			public void actionPerformed(ActionEvent e)
			{
				try
				{//转换
					port = Integer.parseInt(userText.getText().trim());
					if(null != userPwdText.getPassword() && userPwdText.getPassword().length!=0)
					{
						LoginWindow.this.dispose();
						new ChatWindow(port);//设置
					}
				}
				catch(NumberFormatException e1)
				{
					userText.setText("用户名输入有误");
				}
			}
		});
		button1.setText("登陆");
		//事件监听
		button2 = new JButton();
		button2.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				System.exit(0);
			}
		}
		);
		//加入组件
		button2.setBounds(new Rectangle(197, 210, 63, 25));
		button2.setText("取消");
	    contentPane.add(jl1);
	    contentPane.add(userText);
	    contentPane.add(jl2);
	    contentPane.add(userPwdText);
	    contentPane.add(button1);
	    contentPane.add(button2);
		this.setVisible(true);
	}
	public static void main(String[] args) {
		new LoginWindow();//完成
	}
}