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Thread: Java telnet session

  1. #1
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    Default Java telnet session

    Good day,

    Please help as i am trying to create a java telnet session, however what is the correct jar file to download for this, i am trying to use
    "org.apache.commons.net.telnet.TelnetClient" but my TelnetSession does not know of this and therefor giving an error.

    For additional information please see the rest of my code below.

    [Code=JAVA]

    public class EasyTelnet extends javax.swing.JFrame {
    import java.net.*;
    import java.io.*;
    import org.apache.commons.net.telnet.TelnetClient;


    /**
    * Creates new form EasyTelnet
    */
    public EasyTelnet() {
    initComponents();
    }

    /**
    * 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.
    */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

    jLabel2 = new javax.swing.JLabel();
    jLabel1 = new javax.swing.JLabel();
    Host = new javax.swing.JTextField();
    jLabel3 = new javax.swing.JLabel();
    jLabel4 = new javax.swing.JLabel();
    username = new javax.swing.JTextField();
    Password = new javax.swing.JTextField();
    TelnetButton = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstan ts.EXIT_ON_CLOSE);

    jLabel2.setText("Insert details below to telnet");

    jLabel1.setFont(new java.awt.Font("Tahoma", 1, 12)); // NOI18N
    jLabel1.setForeground(new java.awt.Color(255, 0, 0));
    jLabel1.setText("Host:");

    Host.addActionListener(new java.awt.event.ActionListener() {
    public void actionPerformed(java.awt.event.ActionEvent evt) {
    HostActionPerformed(evt);
    }
    });

    jLabel3.setFont(new java.awt.Font("Tahoma", 1, 12)); // NOI18N
    jLabel3.setForeground(new java.awt.Color(255, 0, 0));
    jLabel3.setText("Username:");

    jLabel4.setFont(new java.awt.Font("Tahoma", 1, 12)); // NOI18N
    jLabel4.setForeground(new java.awt.Color(255, 0, 0));
    jLabel4.setText("Password:");

    username.addActionListener(new java.awt.event.ActionListener() {
    public void actionPerformed(java.awt.event.ActionEvent evt) {
    usernameActionPerformed(evt);
    }
    });

    Password.addActionListener(new java.awt.event.ActionListener() {
    public void actionPerformed(java.awt.event.ActionEvent evt) {
    PasswordActionPerformed(evt);
    }
    });

    TelnetButton.setText("Telnet");
    TelnetButton.addActionListener(new java.awt.event.ActionListener() {
    public void actionPerformed(java.awt.event.ActionEvent evt) {
    TelnetButtonActionPerformed(evt);
    }
    });

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
    layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
    .addGroup(layout.createSequentialGroup()
    .addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.LEADING)
    .addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.TRAILING)
    .addGroup(layout.createSequentialGroup()
    .addContainerGap()
    .addComponent(jLabel1)
    .addPreferredGap(javax.swing.LayoutStyle.Component Placement.UNRELATED)
    .addComponent(Host, javax.swing.GroupLayout.PREFERRED_SIZE, 107, javax.swing.GroupLayout.PREFERRED_SIZE))
    .addGroup(javax.swing.GroupLayout.Alignment.LEADIN G, layout.createSequentialGroup()
    .addGap(129, 129, 129)
    .addComponent(jLabel2)))
    .addGroup(layout.createSequentialGroup()
    .addContainerGap()
    .addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.LEADING)
    .addGroup(layout.createSequentialGroup()
    .addComponent(jLabel4)
    .addPreferredGap(javax.swing.LayoutStyle.Component Placement.RELATED)
    .addComponent(Password, javax.swing.GroupLayout.PREFERRED_SIZE, 86, javax.swing.GroupLayout.PREFERRED_SIZE))
    .addGroup(layout.createSequentialGroup()
    .addComponent(jLabel3)
    .addPreferredGap(javax.swing.LayoutStyle.Component Placement.RELATED)
    .addComponent(username, javax.swing.GroupLayout.PREFERRED_SIZE, 86, javax.swing.GroupLayout.PREFERRED_SIZE))))
    .addGroup(layout.createSequentialGroup()
    .addGap(155, 155, 155)
    .addComponent(TelnetButton)))
    .addContainerGap(129, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
    layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
    .addGroup(layout.createSequentialGroup()
    .addContainerGap()
    .addComponent(jLabel2)
    .addGap(18, 18, 18)
    .addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.BASELINE)
    .addComponent(jLabel1)
    .addComponent(Host, javax.swing.GroupLayout.PREFERRED_SIZE, 15, javax.swing.GroupLayout.PREFERRED_SIZE))
    .addGap(38, 38, 38)
    .addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.BASELINE)
    .addComponent(jLabel3)
    .addComponent(username, javax.swing.GroupLayout.PREFERRED_SIZE, 15, javax.swing.GroupLayout.PREFERRED_SIZE))
    .addGap(18, 18, 18)
    .addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.BASELINE)
    .addComponent(jLabel4)
    .addComponent(Password, javax.swing.GroupLayout.PREFERRED_SIZE, 15, javax.swing.GroupLayout.PREFERRED_SIZE))
    .addGap(29, 29, 29)
    .addComponent(TelnetButton)
    .addContainerGap(45, Short.MAX_VALUE))
    );

    pack();
    }// </editor-fold>

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

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

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

    private void TelnetButtonActionPerformed(java.awt.event.ActionE vent evt) {
    // TODO add your handling code here:
    String hostIP = Host.getText();
    String UsernameS = username.getText();
    String Pass = Password.getText();
    String shellPrompt = "$";



    TelnetSession session = new TelnetSession(hostIP);

    session.setLoginPrompt(UsernameS);

    session.setPasswordPrompt(Pass);

    session.setShellPrompt(shellPrompt);

    session.connect (UsernameS,Pass);

    //This is where i will put my Telnet commands and send them to the device






    }

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
    /* 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 How to Set the Look and Feel (The Java™ Tutorials > Creating a GUI With JFC/Swing > Modifying the Look and Feel)
    */
    try {
    for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
    if ("Nimbus".equals(info.getName())) {
    javax.swing.UIManager.setLookAndFeel(info.getClass Name());
    break;
    }
    }
    } catch (ClassNotFoundException ex) {
    java.util.logging.Logger.getLogger(EasyTelnet.clas s.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
    java.util.logging.Logger.getLogger(EasyTelnet.clas s.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
    java.util.logging.Logger.getLogger(EasyTelnet.clas s.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
    java.util.logging.Logger.getLogger(EasyTelnet.clas s.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
    public void run() {
    new EasyTelnet().setVisible(true);
    }
    });
    }
    // Variables declaration - do not modify
    private javax.swing.JTextField Host;
    private javax.swing.JTextField Password;
    private javax.swing.JButton TelnetButton;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JTextField username;
    // End of variables declaration
    }

    /code


  2. #2
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    Default Re: Java telnet session

    It seems that your [code] wrapping tags in your post above are a bit off such that they didn't take effect on your code...

    A search on the Internet using the search term "org.apache.commons.net.telnet.TelnetClient" shows that it's in the Apache Commons Net library. That's where you can get the jar file. Remember to add the jar file to the classpath.

  3. #3
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    Default Re: Java telnet session

    Thank you Jashburn for the information, Sorry about the Wrappings. I will apply what you have suggested

    Thanks

    Sihle

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