通过GUI制作一个简单的消息对话框互发消息

public class LTS extends JFrame {

	private JPanel contentPane;
	private JTextField textField;
	private JTextField textField_1;

	/**
	 * Launch the application.
	 */
	private static PrintWriter pw=null;
	private static BufferedReader br=null;
	private static Socket s;
	static Scanner scanner=new Scanner(System.in);
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					LTS frame = new LTS();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public LTS() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 571, 396);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);

		textField = new JTextField();
		textField.setColumns(10);

		textField_1 = new JTextField();
		textField_1.setColumns(10);

		JButton btnNewButton = new JButton("\u53D1\u9001");
		btnNewButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				try {
					SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

						System.out.println("Client端请输入：");
						String str =textField_1.getText() ;
						pw.println(str+"   "+"黄凯"+"    "+df.format(new Date()));
						pw.flush();
						String string=br.readLine();
						textField.setText(string);
						if(string.equals("exit")){
						}

				}catch (Exception e1) {
						// TODO Auto-generated catch block
						e1.printStackTrace();
				}
//				try {
//					br.close();
//					pw.close();
//				} catch (IOException e1) {
//						// TODO Auto-generated catch block
//						e1.printStackTrace();
//				}

			}
		});

		JButton button = new JButton("\u53D6\u6D88");
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
			}
		});

		JButton btnIp = new JButton("IP");
		btnIp.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {

				try {
					Socket s=new Socket("175.3.15.9",8532);
					pw=new PrintWriter(new OutputStreamWriter(s.getOutputStream()));
					br=new BufferedReader(new InputStreamReader(s.getInputStream()));
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}

			}
		});
		GroupLayout gl_contentPane = new GroupLayout(contentPane);
		gl_contentPane.setHorizontalGroup(
			gl_contentPane.createParallelGroup(Alignment.TRAILING)
				.addComponent(textField, GroupLayout.DEFAULT_SIZE, 555, Short.MAX_VALUE)
				.addGroup(gl_contentPane.createSequentialGroup()
					.addComponent(textField_1, GroupLayout.PREFERRED_SIZE, 545, GroupLayout.PREFERRED_SIZE)
					.addContainerGap())
				.addGroup(gl_contentPane.createSequentialGroup()
					.addComponent(btnIp, GroupLayout.PREFERRED_SIZE, 57, GroupLayout.PREFERRED_SIZE)
					.addPreferredGap(ComponentPlacement.RELATED, 356, Short.MAX_VALUE)
					.addComponent(button)
					.addGap(18)
					.addComponent(btnNewButton)
					.addContainerGap())
		);
		gl_contentPane.setVerticalGroup(
			gl_contentPane.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_contentPane.createSequentialGroup()
					.addComponent(textField, GroupLayout.PREFERRED_SIZE, 218, GroupLayout.PREFERRED_SIZE)
					.addPreferredGap(ComponentPlacement.RELATED)
					.addComponent(textField_1, GroupLayout.PREFERRED_SIZE, 80, GroupLayout.PREFERRED_SIZE)
					.addPreferredGap(ComponentPlacement.RELATED)
					.addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)
						.addComponent(btnIp, GroupLayout.PREFERRED_SIZE, 34, GroupLayout.PREFERRED_SIZE)
						.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
							.addComponent(btnNewButton, GroupLayout.DEFAULT_SIZE, 34, Short.MAX_VALUE)
							.addComponent(button, GroupLayout.PREFERRED_SIZE, 34, GroupLayout.PREFERRED_SIZE)))
					.addContainerGap())
		);
		contentPane.setLayout(gl_contentPane);
	}
}