chatjframe.java

多线程扫描IP段

/*
 * ChatJFrame.java
 * Created on 2008年6月20日, 上午9:02
 */
/**
 * @author  asdtiang
 */
import java.net.*;
public class ChatJFrame extends javax.swing.JFrame {
    
    /** Creates new form ChatJFrame */
    public ChatJFrame() {
        initComponents();
       
    }
    public void title(String ip,String name){
        rname=name;
        this.setTitle("IP为："+ip+"计算机名为："+rname);
        msg.setColumns(20);
        msg.setLineWrap(true);
        this.setSize(400, 200);
        this.setVisible(true);  
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        jScrollPane2 = new javax.swing.JScrollPane();
        msg = new javax.swing.JTextArea();

        jButton1.setText("Send");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        msg.setColumns(20);
        msg.setRows(5);
        jScrollPane2.setViewportView(msg);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jButton1)
                    .addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 354, Short.MAX_VALUE))
                .addGap(36, 36, 36))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 99, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jButton1)
                .addContainerGap(23, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
          try{
              DatagramSocket socket=new DatagramSocket();
              String info;
              info=null;
              info=msg.getText();
              byte[] b;
              b=info.getBytes();
              DatagramPacket packet=new DatagramPacket(b,b.length);
              InetAddress raddr= InetAddress.getByName(rname);
              packet.setAddress(raddr);
              packet.setPort(3000);
              socket.send(packet);
              ChatMainJFrame.msg.append("To: "+rname+"\n"+"     "+info+"\n");
              msg.setText("");     
              
          }
          catch(Exception e){}// TODO add your handling code here:
    }//GEN-LAST:event_jButton1ActionPerformed

    /**
     * @param args the command line arguments
     */
   
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTextArea msg;
    // End of variables declaration//GEN-END:variables
    public String rname=null;
}