scanhost.java~1~

有关JAVA的程序,研究P2P的chord协议,相信大家会喜欢的!

package javanet;

import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
import java.net.InetAddress;
import java.net.DatagramSocket;
import java.net.DatagramPacket;
import java.net.Socket;
public class Scanhost
    extends JFrame {
  Object sort[]={"TCP/IP","UDP"};
  BorderLayout borderLayout1 = new BorderLayout();
  JButton jButton1 = new JButton();
  JTextField jTextField1 = new JTextField();
  JLabel jLabel1 = new JLabel();
  JComboBox jComboBox1 = new JComboBox(sort);
  JLabel jLabel2 = new JLabel();
  JButton jButton2 = new JButton();
  JScrollPane jScrollPane1 = new JScrollPane();
  JList jList1 = new JList();
  DefaultListModel model=new DefaultListModel();
  DatagramSocket socket;
  DatagramPacket packet;
  String s="0";
  String head;
  int fol=0;
  Socket sockett;
  public Scanhost() {
    try {
      jbInit();
    }
    catch (Exception exception) {
      exception.printStackTrace();
    }
  }
  public void scanUDP()
  {
    try
    {
      if(fol>255){return;}
      InetAddress addr = InetAddress.getByName(head + fol);
      socket = new DatagramSocket();
      packet = new DatagramPacket(s.getBytes(), s.getBytes().length, addr, 8181);
      model.addElement(addr.toString().replaceAll("/",""));
      socket.close();
      throw new Exception();
    }catch(Exception er){fol++;scanUDP();}
  }
  public void scanTCP()
  {
    try
    {
      if(fol>255){return;}
      sockett = new Socket(head + fol, 8000);
      model.addElement(head+fol);
      sockett.close();
      throw new Exception();
    }catch(Exception er){fol++;scanTCP();}
  }

  private void jbInit() throws Exception {
    setSize(new Dimension(297, 260));
    getContentPane().setLayout(null);
    jButton1.setBounds(new Rectangle(56, 179, 68, 29));
    jButton1.setFont(new java.awt.Font("Dialog", Font.PLAIN, 13));
    jButton1.setText("扫描");
    jButton1.addActionListener(new Scanhost_jButton1_actionAdapter(this));
    this.setTitle("扫描可连接的主机");
    jLabel1.setFont(new java.awt.Font("Dialog", Font.PLAIN, 13));
    jLabel1.setText("起始位置:");
    jLabel1.setBounds(new Rectangle(8, 140, 59, 26));
    jLabel2.setFont(new java.awt.Font("Dialog", Font.PLAIN, 13));
    jLabel2.setText("类      型:");
    jLabel2.setBounds(new Rectangle(148, 140, 59, 26));
    jComboBox1.setBounds(new Rectangle(210, 140, 69, 26));
    jButton2.setFont(new java.awt.Font("Dialog", Font.PLAIN, 13));
    jButton2.addActionListener(new Scanhost_jButton2_actionAdapter(this));
    jTextField1.setToolTipText("如:192.168.1.1");
    this.getContentPane().add(jComboBox1);
    jScrollPane1.setBounds(new Rectangle(40, 7, 211, 116));
    jButton2.setBounds(new Rectangle(170, 179, 68, 29));
    jButton2.setText("关闭");
    this.getContentPane().add(jLabel1);
    this.getContentPane().add(jTextField1);
    this.getContentPane().add(jLabel2);
    jList1.setModel(model);
    this.getContentPane().add(jButton1);
    this.getContentPane().add(jButton2);
    this.getContentPane().add(jScrollPane1);
    jScrollPane1.getViewport().add(jList1);
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = this.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    this.setLocation( (screenSize.width - frameSize.width) / 2,
                      (screenSize.height - frameSize.height) / 2);
    jTextField1.setText("");
    jTextField1.setBounds(new Rectangle(70, 140, 69, 26));
  }

  public void jButton2_actionPerformed(ActionEvent e) {
    this.dispose();
  }

  public void jButton1_actionPerformed(ActionEvent e) {
    model.removeAllElements();
    String temp=jTextField1.getText().trim();
    try
    {
      head = temp.substring(0, temp.lastIndexOf(".") + 1);
      fol = Integer.parseInt(temp.substring(temp.lastIndexOf(".") + 1,
                                            temp.length()));
    }catch(Exception er){
      new JOptionPane().showMessageDialog(this,"地址格式不正确","错误",0);
      return;
    }
    if(jComboBox1.getSelectedIndex()==0)
    {
      scanTCP();
    }else
    {
      scanUDP();
    }
    fol=0;
  }
}

class Scanhost_jButton1_actionAdapter
    implements ActionListener {
  private Scanhost adaptee;
  Scanhost_jButton1_actionAdapter(Scanhost adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}

class Scanhost_jButton2_actionAdapter
    implements ActionListener {
  private Scanhost adaptee;
  Scanhost_jButton2_actionAdapter(Scanhost adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.jButton2_actionPerformed(e);
  }
}