frame1.java~44~

java灵感设计

package udpclient;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.*;
import java.io.*;
import java.util.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

public class Frame1 extends JFrame {
  JPanel contentPane;
  byte[] sendBuf =new byte[256];
  DatagramPacket packet;
  InetAddress address;
  int port;
  DatagramSocket socket=null;
  TextField textField1 = new TextField();
  TextField textField2 = new TextField();
  Button button1 = new Button();
  TextField textField3 = new TextField();
  Label label1 = new Label();
  Label label2 = new Label();
  Label label3 = new Label();

  //Construct the frame
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    textField1.setText("请输入UDP服务器端口号!");
    textField1.setBounds(new Rectangle(174, 43, 190, 29));
    contentPane.setLayout(null);
    this.setSize(new Dimension(400, 300));
    this.setTitle("UDP客户端");
    textField2.setText("");
    textField2.setBounds(new Rectangle(176, 92, 189, 28));
    button1.setLabel("开始通信");
    button1.setBounds(new Rectangle(124, 196, 124, 40));
    button1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    textField3.setBounds(new Rectangle(176, 137, 189, 32));
    label1.setText("服务器端口号");
    label1.setBounds(new Rectangle(42, 46, 76, 28));
    label2.setText("服务器名称:");
    label2.setBounds(new Rectangle(40, 97, 97, 27));
    label3.setText("服务器返回信息:");
    label3.setBounds(new Rectangle(40, 145, 112, 20));
    contentPane.add(textField2, null);
    contentPane.add(label1, null);
    contentPane.add(textField3, null);
    contentPane.add(textField1, null);
    contentPane.add(label3, null);
    contentPane.add(label2, null);
    contentPane.add(button1, null);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  void button1_actionPerformed(ActionEvent e) {
        try
      {
      socket=new DatagramSocket();
      }
      catch(java.io.IOException ee)
      {
      System.err.println("创建数据报失败.");
      }
      if(socket!=null)
      {
      try
      {
      port=Integer.parseInt(textField1.getText());
      address=InetAddress.getByName(textField2.getText());
      packet=new DatagramPacket(sendBuf,256,address,port);
      socket.send(packet);
      packet=new DatagramPacket(sendBuf,256);
      socket.receive(packet);
      String received=new String(packet.getData());
      textField3.setText(received);
      socket.close();
      }
      catch(IOException fe)
      {
      System.err.println("IO异常:"+fe);
      fe.printStackTrace();
      }
      }
  }

}