windows.java

这是一个最简单的通信软件 里面包含了一些基本的通信知识

import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import java.net.*; 
import java.text.DecimalFormat;
interface Module
{
	TextArea display=new TextArea(12,65);
	TextArea write=new TextArea(8,65);
	Button send=new Button("发送");
	Button close=new Button("关闭");
	Button talk=new Button("语音聊天");	
	boolean start=true;
}



public class Windows extends Frame implements ActionListener,Module
{
	
	Windows()
	{
		super("聊天工具");
		addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);	
			}	
			
		});	
	
	
	    setSize(500,500);
	    setLocation(300,300);
	    setFont(new Font("Arial",Font.PLAIN,12));
	    setLayout(new FlowLayout());	
	    display.setEditable(false);
	    add(display);
	    add(write);
	    add(send);
	    add(close);
	    add(talk);
	    send.addActionListener(this);
	    close.addActionListener(this);
	    talk.addActionListener(this);
	    show();
	}
	
	
	
	
	public static void main(String args[])throws IOException
	{
		
		
		new Windows();
		new RecieveThread().start();
	
	
	}
		
	
	
	
	public void actionPerformed(ActionEvent e)
	{
		
		if(e.getSource()==send)
		{
			String s;
		    if((write.getText().toString()).equals(""))
			{
							
				JOptionPane.showMessageDialog(null,"发送的内同不能为空!","注意",JOptionPane.INFORMATION_MESSAGE);	
			}	
			else
			{
				display.append("老大:"+(new Date().toString())+"\n"+write.getText()+"\n");	
				write.setText("");
				new SendThread().start();
			}			
		
		
		}
		
		if(e.getSource()==close)
		{
			
			System.exit(0);	
			
		}
	
	}
	

}




class SendThread extends Thread implements Module
{
	public SendThread()
	{
		super("发送线程");
			
	}
	
	
	byte [] buf=new byte[256];
	DatagramSocket socket=null;
	DatagramPacket packet=null;
	
	public void run()
	{
		try
		{
			String s=write.getText();
			byte [] buf=new byte[256];			
			InetAddress address=InetAddress.getByName("122.96.88.93");
			DatagramPacket packet=new DatagramPacket(buf,buf.length,address,4445);
			DatagramSocket socket=new DatagramSocket();
			socket.send(packet);							
			
		}
		catch(IOException e)
		{
			display.append("无法建立连接!\n");	
		}	
	}
	
}



 class RecieveThread extends Thread implements Module
{
	
	public RecieveThread()
	{
		super("接收线程");	
	}
	
	byte [] buf=new byte[256];
	DatagramSocket socket=null;
	DatagramPacket packet=null;
	
	public void run()
	{
		try
		{
		 	socket=new DatagramSocket();
		    packet=new DatagramPacket(buf,buf.length);
		}
		catch(IOException e)
		{
			
		}
		
		while(true)
		{
			try
			{
				socket.receive(packet);			  
			    String received=new String(packet.getData());					
			    String s="楼新月: "+(new Date().toString())+"\n"+received+"\n";
			    display.append(s);
			}
			catch(IOException e)
			{
					
			}
			
				
		
		}
			
	}		

}