client.java

聊天室

package com.briup.ChatServerClient;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Client {
	
	JFrame loginFrame;
	JTextArea incoming;
	JTextField outgoing;
	JTextField nameText;
	BufferedReader reader;
	PrintWriter writer;
	Socket sock;
	String nickname;
	JFrame frame;
	JScrollPane qScroller;
	
	
	
	public static void main(String[] args) {
		Client client = new Client();
		client.go();
	}
	
	
	public void go() {
		
		JFrame frame = new JFrame("Francis Yan's Chat Client");
		JPanel mainPanel = new JPanel();
		incoming = new JTextArea(15,26);
		incoming.setLineWrap(true);
		incoming.setWrapStyleWord(true);
		incoming.setEditable(false);
		
		
		
		qScroller = new JScrollPane(incoming);
		qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
		
		qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		qScroller.setAutoscrolls(true);
		outgoing = new JTextField(30);
		JButton sendButton = new JButton("Send");
		JButton clrButton = new JButton("Clear");
		clrButton.addActionListener(new ClrButtonListener());
		sendButton.addActionListener(new SendButtonListener());
		nameText = new JTextField(8);
		JLabel nameLabel = new JLabel("Nickname:");
		outgoing.addKeyListener(new EnterListener());
		
		mainPanel.add(qScroller);
		mainPanel.add(outgoing);
		mainPanel.add(nameLabel);
		mainPanel.add(nameText);
		mainPanel.add(sendButton);
		mainPanel.add(clrButton);
		frame.getContentPane().add(BorderLayout.CENTER,mainPanel);
		JMenuBar menuBar = new JMenuBar();
		JMenu fileMenu = new JMenu("Menu");
		JMenuItem saveMenuItem = new JMenuItem("Save Text");
		JMenuItem exitMenuItem = new JMenuItem("Exit");
		saveMenuItem.addActionListener(new SaveListener());
		exitMenuItem.addActionListener(new ExitListener());
		fileMenu.add(saveMenuItem);
		fileMenu.add(exitMenuItem);
		menuBar.add(fileMenu);
		frame.setJMenuBar(menuBar);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		qScroller.setWheelScrollingEnabled(true);
		frame.setSize(400,340);
		
		frame.setResizable(false);
		frame.setVisible(true);
		
		setUpNetworking();
		
		Thread readerThread = new Thread(new IncomingReader());
		readerThread.start();
		
		
		
	}
	
	
	private void setUpNetworking() {
		
		try {
			sock = new Socket("192.168.1.1",5000);
			InputStreamReader streamReader = new InputStreamReader(sock.getInputStream());
			reader = new BufferedReader(streamReader);
			writer = new PrintWriter(sock.getOutputStream());
			System.out.println("networking established");
		}
		catch(IOException ex) {
			ex.printStackTrace();
		}
	}
	
	
	
	
	public class SendButtonListener implements ActionListener {
		public void actionPerformed(ActionEvent ev) {
			try {
					if(nameText.getText().equals("")) incoming.append("Please input your name\n");
					else{
					if(outgoing.getText().equals("")) incoming.append("Couldn't send empty message\n");
					else{writer.println(nameText.getText()+": "+outgoing.getText());
					writer.flush();}}
					
				
			}
			catch(Exception ex) {
				ex.printStackTrace();
			}
			
			outgoing.setText("");
			outgoing.requestFocus();
			//System.out.println(incoming.getText().length());
		}
	}
	
	public class ClrButtonListener implements ActionListener {
		public void actionPerformed(ActionEvent ev) {
			
			incoming.setText("");
			
		}
	}
	
	public class EnterListener extends KeyAdapter {

		public void keyPressed(KeyEvent e){
			if(e.getKeyCode()==10){
				//try{Thread.sleep(1000);}catch(Exception ex){ex.printStackTrace();}
				try {
					if(nameText.getText().equals("")) incoming.append("Please input your name\n");
					else{
					if(outgoing.getText().equals("")) incoming.append("Couldn't send empty message\n");
					else{writer.println(nameText.getText()+": "+outgoing.getText());
					writer.flush();}}
				}
				catch(Exception ex) {
					ex.printStackTrace();
				}
			
				outgoing.setText("");
				outgoing.requestFocus();
			}
		}
	}
	
	public class SaveListener implements ActionListener {
		public void actionPerformed(ActionEvent ev) {
			
			try {
				FileWriter fileWriter = new FileWriter("Record.txt");
				fileWriter.write(incoming.getText());
				fileWriter.close();
			}
			catch(IOException ex) {
				System.out.println("couldn't write the Chatting Record!!");
				ex.printStackTrace();
			}
			
		}
	}
	
	public class ExitListener implements ActionListener {
		public void actionPerformed(ActionEvent ev) {
			
			System.exit(0);
			
		}
	}
	
			
	
			
		
	
		
	
	
	public class IncomingReader implements Runnable {
		public void run() {
			String message;
			try {
				
				while((message=reader.readLine())!=null) {
					System.out.println("read"+"  "+message);
					incoming.append(message + "\n");
					incoming.setCaretPosition(incoming.getText().length());
					
				}
			}
			catch (Exception ex) {ex.printStackTrace();}
		}
	}
	
	
}