【实例简介】使用了线程、实现了多人聊天室。

【实例截图】

【核心代码】

package com.wanggensheng.chatClient;

import javax.swing.GroupLayout;

import javax.swing.GroupLayout.Alignment;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JTextArea;

import javax.swing.LayoutStyle.ComponentPlacement;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.io.IOException;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.JScrollPane;

public class ClientMainWindow extends JFrame {

private static final long serialVersionUID = 1L;

private JScrollPane scrollPane_1;

JTextArea chatWindow;

JTextArea userList;

JTextArea SendMsg;

JButton chatCancelButton;

JButton chatSendButton;

String userName;

String sex;

String userInputName;

/**

* Create the frame.

*/

public ClientMainWindow() {

setAlwaysOnTop(false);

addWindowListener(new WindowAdapter() {

@Override

//关闭窗口动作响应，发送下线信息

public void windowClosing(WindowEvent arg0) {

try {

ChatManager.getCM().send("下线了：" LoginWindow.userInputName ":" LoginWindow.sex);

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

});

setTitle("聊天客户端~~" LoginWindow.userInputName);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 520, 360);

JLabel label = new JLabel("消息窗口");

JLabel label_1 = new JLabel("在线用户列表");

chatSendButton = new JButton("发送");

chatSendButton.addMouseListener(new MouseAdapter() { //发送按钮的事件响应

@Override

public void mouseClicked(MouseEvent arg0) {

try {

ChatManager.getCM().send(LoginWindow.userInputName ":" SendMsg.getText());

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

SendMsg.setText("");

}

});

chatCancelButton = new JButton("取消");

chatCancelButton.addMouseListener(new MouseAdapter() { //设定取消按钮的事件响应，清空输入框

@Override

public void mouseClicked(MouseEvent e) {

SendMsg.setText("");

}

});

SendMsg = new JTextArea();

SendMsg.setText("你好");

SendMsg.setColumns(10);

JScrollPane scrollPane = new JScrollPane();

/*

* 窗体参数设置，自动生成

*/

scrollPane_1 = new JScrollPane();

GroupLayout groupLayout = new GroupLayout(getContentPane());

groupLayout.setHorizontalGroup(

groupLayout.createParallelGroup(Alignment.LEADING)

.addGroup(groupLayout.createSequentialGroup()

.addContainerGap()

.addGroup(groupLayout.createParallelGroup(Alignment.TRAILING)

.addGroup(groupLayout.createSequentialGroup()

.addGroup(groupLayout.createParallelGroup(Alignment.LEADING)

.addComponent(SendMsg, Alignment.TRAILING, GroupLayout.DEFAULT_SIZE, 391, Short.MAX_VALUE)

.addComponent(label)

.addComponent(scrollPane, GroupLayout.DEFAULT_SIZE, 382, Short.MAX_VALUE))

.addGap(18)

.addGroup(groupLayout.createParallelGroup(Alignment.LEADING)

.addComponent(scrollPane_1, GroupLayout.PREFERRED_SIZE, 84, GroupLayout.PREFERRED_SIZE)

.addComponent(label_1))

.addGap(10))

.addGroup(Alignment.LEADING, groupLayout.createSequentialGroup()

.addComponent(chatSendButton, GroupLayout.PREFERRED_SIZE, 89, GroupLayout.PREFERRED_SIZE)

.addGap(96)

.addComponent(chatCancelButton, GroupLayout.PREFERRED_SIZE, 83, GroupLayout.PREFERRED_SIZE)))

.addGap(0))

);

groupLayout.setVerticalGroup(

groupLayout.createParallelGroup(Alignment.LEADING)

.addGroup(groupLayout.createSequentialGroup()

.addContainerGap()

.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)

.addComponent(label)

.addComponent(label_1))

.addPreferredGap(ComponentPlacement.UNRELATED)

.addGroup(groupLayout.createParallelGroup(Alignment.TRAILING)

.addGroup(groupLayout.createSequentialGroup()

.addComponent(scrollPane, GroupLayout.DEFAULT_SIZE, 200, Short.MAX_VALUE)

.addGap(18)

.addComponent(SendMsg, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))

.addComponent(scrollPane_1, GroupLayout.DEFAULT_SIZE, 242, Short.MAX_VALUE))

.addGap(11)

.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)

.addComponent(chatCancelButton)

.addComponent(chatSendButton, GroupLayout.PREFERRED_SIZE, 24, GroupLayout.PREFERRED_SIZE))

.addContainerGap())

);

userList = new JTextArea();

userList.setEditable(false);

scrollPane_1.setViewportView(userList);

userList.setLineWrap(true);

chatWindow = new JTextArea();

chatWindow.setEditable(false);

scrollPane.setViewportView(chatWindow);

chatWindow.setLineWrap(true);

chatWindow.setText("欢迎进入聊天室......" "\n");

getContentPane().setLayout(groupLayout);

}

/*

* 以下为给文本域追加消息的方法

* append2ChatWindow(String in)

* append2UserList(String in)

*/

public void append2ChatWindow(String in) {

chatWindow.append(in);

chatWindow.setCaretPosition(chatWindow.getText().length());

}

public void append2UserList(String in) {

userList.append(in);

userList.setCaretPosition(userList.getText().length());

}

public void clearUserList() {

userList.setText(null);

}

}