frame1.java~1~

这是一个网络编程原码,用于传递消息的简单程序.

package untitled4;

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

public class Frame1 extends JFrame {
  JPanel jPanel1 = new JPanel();
  JScrollPane jScrollPane1 = new JScrollPane();
  JTextArea servertext = new JTextArea();
  public Frame1() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    Frame1 frame1 = new Frame1();
    frame1.setBounds(100,100,400,400);
    frame1.setVisible(true);
    Socket serverSocket;
    BufferedReader in;
    PrintWriter out;
    try{
      ServerSocket s = new ServerSocket(123);
      serverSocket=s.accept();
      in=new BufferedReader(new InputStreamReader(serverSocket.getInputStream()));
      out=new PrintWriter(serverSocket.getOutputStream());
      while(true)
      {
        double r=Double.parseDouble(in.readLine());
        frame1.servertext.append("接收客户机的半径值为:"+r+"\n");
        double area=3.14*r*r;
        out.println(area);
        out.flush();
      }
    }catch(IOException e)
    {
      JOptionPane.showMessageDialog(null,"监听不到端口");
    }


  }
  private void jbInit() throws Exception {
    this.setTitle("服务器端");
    this.addWindowListener(new Frame1_this_windowAdapter(this));
    jPanel1.setLayout(null);
    jScrollPane1.setBounds(new Rectangle(19, 47, 352, 233));
    servertext.setFont(new java.awt.Font("Dialog", 0, 20));
    servertext.setText("");
    this.getContentPane().add(jPanel1, BorderLayout.CENTER);
    jPanel1.add(jScrollPane1, null);
    jScrollPane1.getViewport().add(servertext, null);
  }

  void this_windowClosing(WindowEvent e) {
System.exit(0);
  }
}

class Frame1_this_windowAdapter extends java.awt.event.WindowAdapter {
  Frame1 adaptee;

  Frame1_this_windowAdapter(Frame1 adaptee) {
    this.adaptee = adaptee;
  }
  public void windowClosing(WindowEvent e) {
    adaptee.this_windowClosing(e);
  }
}