package client;
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.AbstractButton;
public class Client extends JFrame {
private JTextField nameField1,mailField2,field;
private JRadioButton maleButton,womenButton;
private JComboBox sdept;
private ButtonGroup radioGroup;
private JButton button;
private JTextArea displayArea,displayArea2;
private DatagramSocket socket;
// set up GUI and DatagramSocket
public Client()
{ super( "客户应用" );
Container container = getContentPane();
container.setLayout(new FlowLayout());
Box box1=Box.createHorizontalBox();
JLabel label1=new JLabel("姓名:");
box1.add(label1);
nameField1= new JTextField(10);
box1.add(nameField1);
container.add(box1);
Box box2=Box.createHorizontalBox();
JLabel label2=new JLabel("性别：");
box2.add(label2);
maleButton=new JRadioButton("男",true);
box2.add(maleButton);
womenButton=new JRadioButton("女",false);
box2.add(womenButton);
radioGroup= new ButtonGroup();
radioGroup.add(maleButton);
radioGroup.add(womenButton);
container.add(box2);
JLabel label3=new JLabel("电子邮箱：");
container.add(label3);
mailField2=new JTextField(20);
container.add(mailField2);
Box box3=Box.createHorizontalBox();
JLabel label4=new JLabel("备注：");
box3.add(label4);
displayArea=new JTextArea(5,12);
box3.add(new JScrollPane( displayArea ));
button=new JButton("提交");
box3.add(button);
container.add(box3);
Box box4=Box.createHorizontalBox();
displayArea2=new JTextArea(5,13);
box4.add(displayArea2);
container.add(box4);
setSize( 300,500);
setVisible( true );
button .addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent event )
{ // create and send packet
try {
// get message from textfield and convert to byte array
String string=new String();
string ="姓名：" +nameField1.getText() + "\n"+"性别：" +radioGroup.getElements().nextElement()+ "电子邮箱："+mailField2.getText()+"备注："+displayArea.getText();
String message = string;
byte data[] = message.getBytes();
// create sendPacket
DatagramPacket sendPacket = new DatagramPacket( data,
data.length, InetAddress.getLocalHost(), 5000 );
socket.send( sendPacket ); // send packet
}
catch ( IOException ioException ) {
ioException.printStackTrace();
}
} // end actionPerformed
} // end inner class
); // end call to addActionListener
// create DatagramSocket for sending and receiving packets
try {
socket = new DatagramSocket();
}
// catch problems creating DatagramSocket
catch( SocketException socketException ) {
socketException.printStackTrace();
System.exit( 1 );
}
}
// wait for packets to arrive from Server, display packet contents
private void waitForPackets()
{
while ( true ) { // loop forever
// receive packet and display contents
try {
// set up packet
byte data[] = new byte[ 100 ];
DatagramPacket receivePacket = new DatagramPacket(
data, data.length );
socket.receive( receivePacket ); // wait for packet
// display packet contents
displayMessage( "服务器收到的信息是："+ new String( receivePacket.getData(),
0, receivePacket.getLength() ) +
"\n长度为: " + receivePacket.getLength()+
"\n\n对方主机: " + receivePacket.getAddress() +
"\n端口号: " + receivePacket.getPort() );
}
// process problems receiving or displaying packet
catch( IOException exception ) {
displayMessage( exception.toString() + "\n" );
exception.printStackTrace();
}
} // end while
}
// displayArea in the event-dispatch thread
private void displayMessage( final String messageToDisplay )
{
// display message from event-dispatch thread of execution
SwingUtilities.invokeLater(
new Runnable() { // inner class to ensure GUI updates properly
public void run() // updates displayArea
{ displayArea2.append( messageToDisplay );
}
} // end inner class
);
}
public static void main( String args[] )
{
Client application = new Client();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
application.waitForPackets();
}
}
