startframe.java

Java编写即时聊天工具, 拥有注册登陆群聊私聊等功能, 程序包含完整的Document和测试运行环境

package chat;

import java.net.*; 
import java.io.*;

import java.net.*; 
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class StartFrame extends JFrame implements ActionListener{
	public StartFrame() throws IOException
	{
		super("欢迎来到飞腾工作室");
		setSize(400,200);
		//setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container contentPane=getContentPane();
		contentPane.setLayout(new GridLayout(1,2));
		
		JButton registerButton=new JButton("注册");
	    registerButton.setBackground(Color.WHITE);
	    registerButton.addActionListener(this);
	    contentPane.add(registerButton);
	    
	    JButton logButton=new JButton("登录");
	    logButton.setBackground(Color.WHITE);
	    logButton.addActionListener(this);
	    contentPane.add(logButton);
	    
	    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
	    Dimension frameSize = this.getSize();
	    if (frameSize.height > screenSize.height) {
	      frameSize.height = screenSize.height;
	    }
	    if (frameSize.width > screenSize.width) {
	      frameSize.width = screenSize.width;
	    }
	    this.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
	    
	}
	public void actionPerformed(ActionEvent e)
	{
		String buttonString=e.getActionCommand();
		try{			
		    if(buttonString.equals("注册"))
			{		
				Register reg=new Register();
				reg.setVisible(true);
				dispose();	
			}
			else if(buttonString.equals("登录"))
			{
				Log log=new Log();
				log.setVisible(true);
				dispose();
			}
			else {
				System.out.println("异常错误!");
				System.exit(0);
			}
		}
		catch(IOException exc){
       		exc.printStackTrace() ;
    	}   
	}
}