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i want applet connect to another machine but the socket cannot connect to the server i searched the web and there is something about giving permissions to the applet but i donnot know how to do so

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Last Post by NormR1
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What error message do you get?
Did you make a mistake that must be corrected to allow the code to work correctly?

Edited by NormR1: n/a

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there is no error message but the socket of the applet doesnot connect to the server socket couuld you give me some steps to do

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If there is no error message, then it should be working.
Make sure that there are no error messages. Do all the catch blocks call printStackTrace()?


Try writing a simple application (not applet) to connect to the server so that you can be sure that the code is working. If you have problems with the simple program, post a complete program (compiles and executes) here with the error messages.

Edited by NormR1: n/a

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here is the code of the applet

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package testa;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.DatagramSocket;
import java.net.Socket;
import java.net.SocketPermission;

/**
 *
 * @author ali
 */
public class NewJApplet extends javax.swing.JApplet {

    /**
     * Initializes the applet NewJApplet
     */
    @Override
    public void init() {
        
        System.out.println("you entered");
        /*
         * Set the Nimbus look and feel
         */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /*
         * If Nimbus (introduced in Java SE 6) is not available, stay with the
         * default look and feel. For details see
         * http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(NewJApplet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewJApplet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewJApplet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJApplet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /*
         * Create and display the applet
         */
        try {
            java.awt.EventQueue.invokeAndWait(new Runnable() {

                public void run() {
                    initComponents();
                }
            });
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    /**
     * This method is called from within the init() method to initialize the
     * form. WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        textField1 = new java.awt.TextField();
        button1 = new java.awt.Button();
        textField2 = new java.awt.TextField();

        setBackground(new java.awt.Color(255, 153, 255));
        getContentPane().setLayout(null);

        jLabel1.setText("الاسم الرباعي للطالب");
        jLabel1.setName("label1");
        getContentPane().add(jLabel1);
        jLabel1.setBounds(251, 35, 151, 29);

        textField1.setName("text1");
        textField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                textField1ActionPerformed(evt);
            }
        });
        textField1.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyReleased(java.awt.event.KeyEvent evt) {
                textField1KeyReleased(evt);
            }
        });
        getContentPane().add(textField1);
        textField1.setBounds(27, 35, 193, 29);

        button1.setLabel("button1");
        button1.setName("button1");
        button1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                button1MouseClicked(evt);
            }
        });
        button1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button1ActionPerformed(evt);
            }
        });
        getContentPane().add(button1);
        button1.setBounds(51, 130, 183, 33);

        textField2.setName("text2");
        textField2.setText("text2");
        getContentPane().add(textField2);
        textField2.setBounds(68, 90, 195, 20);
    }// </editor-fold>                        

    private void textField1ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
    }                                          

    private void button1ActionPerformed(java.awt.event.ActionEvent evt) {                                        
try{

}
catch(Exception et){
    
}
    }                                       

    private void button1MouseClicked(java.awt.event.MouseEvent evt) {                                     
        // TODO add your handling code here:
        try{
           
            // this.textField2.setText(textField1.getText());
       Socket dd=null;
      if(dd.isConnected()==true){
      System.out.println("hello");
      }
      else{
           System.err.println("not connected");
          dd=new Socket("127.0.0.1",3000);
          System.err.println("not connected");
      }
      DataInputStream c=new DataInputStream(dd.getInputStream());
      DataOutputStream c1=new DataOutputStream(dd.getOutputStream());
      c1.writeUTF("hello");
 System.out.println("yeeeeeeeeeeeeee");

}
catch(Exception et){
 System.out.println("the error is:"+et.getStackTrace());  
}
    }                                    

    private void textField1KeyReleased(java.awt.event.KeyEvent evt) {                                       
this.textField2.setText(textField1.getText());     
// TODO add your handling code here:
    try{
            // this.textField2.setText(textField1.getText());
    /*  Socket dd=new Socket("127.0.0.1",3000);
      DataInputStream c=new DataInputStream(dd.getInputStream());
      DataOutputStream c1=new DataOutputStream(dd.getOutputStream());
      c1.writeUTF("hello");
 System.out.println("yeeeeeeeeeeeeee");
*/
}
catch(Exception et){
  et.getStackTrace();  
}
    }                                      

    // Variables declaration - do not modify                     
    private java.awt.Button button1;
    private javax.swing.JLabel jLabel1;
    private java.awt.TextField textField1;
    private java.awt.TextField textField2;
    // End of variables declaration                   
}

and here is the erreor message
the error is:[Ljava.lang.StackTraceElement;@47609b

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a simple application (not applet) to connect to the server

the error is:[Ljava.lang.StackTraceElement;@47609b

Please post the full contents of the error message. It will show the stack trace and where the error occurred.

I told you in your other posting of this problem to use printStackTrace().

Edited by NormR1: n/a

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i write these permission to the applet
grant {
permission java.net.SocketPermission "*:*", "accept, connect, listen,resolve";
};
and i get this srror message
access denied ("java.net.SocketPermission" "127.0.0.1:3000" "connect,resolve")

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In what file do you put that statement and where is the file located?

Try changing the * to the actual IP address you are using.

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i use netbeans and after i change the permission from the policytool a file was created with the project and i try to change it to the ip but i get this error
access denied ("java.net.SocketPermission" "127.0.0.1:3000" "connect,resolve")

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You did not answer my two questions:
In what file do you put that statement >>> What is the filename?
and where is the file located? >>>> What is the path to the file?

Edited by NormR1: n/a

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My .java.policy file is located here:
C:\Documents and Settings\Norm\.java.policy

The first part of the path is from java's user.home property

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