Help needed, new to java programming

Question

hi,
I have craeted a Frame with some check boxes and button called "button1".
Can anyone tell me how can i count the number of CHECKED check boxes so that when i press the button1 in my code it should display the result as number of checked check boxes divided by total number of check boxes. It should display the result in a textfield here RESULT textfield in my code
Thanks in advance ...i am sending the code i have written so far....
public class Frame extends java.awt.Frame {
    /** Creates new form Frame */
    public Frame() {
        initComponents();
        setSize(600, 600);
    /** 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.
    private void initComponents() {
        buttonGroup1 = new javax.swing.ButtonGroup();
        checkbox1 = new java.awt.Checkbox();
        checkbox2 = new java.awt.Checkbox();
        checkbox3 = new java.awt.Checkbox();
        button1 = new java.awt.Button();
        textField1 = new java.awt.TextField();
        setLayout(null);
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
        checkbox1.setLabel("checkbox1");
        add(checkbox1);
        checkbox1.setBounds(160, 50, 84, 20);
        checkbox2.setLabel("checkbox2");
        add(checkbox2);
        checkbox2.setBounds(160, 70, 84, 20);
        checkbox3.setLabel("checkbox3");
        add(checkbox3);
        checkbox3.setBounds(160, 90, 84, 20);
        button1.setLabel("button1");
        button1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button1ActionPerformed(evt);
        add(button1);
        button1.setBounds(150, 180, 57, 24);
        textField1.setText("Result");
        textField1.setName("Result");
        add(textField1);
        textField1.setBounds(260, 180, 44, 20);
        pack();
    private void button1ActionPerformed(java.awt.event.ActionEvent evt) {
        // Add your handling code here:
    /** Exit the Application */
    private void exitForm(java.awt.event.WindowEvent evt) {
        System.exit(0);
     * @param args the command line arguments
    public static void main(String args[]) {
        new Frame().show();
    // Variables declaration - do not modify
    private java.awt.Button button1;
    private javax.swing.ButtonGroup buttonGroup1;
    private java.awt.Checkbox checkbox1;
    private java.awt.Checkbox checkbox2;
    private java.awt.Checkbox checkbox3;
    private java.awt.TextField textField1;
    // End of variables declaration
}

Answer 1

Two problems in the code you repost-ed:
1. It lacks import statements.
2. There is an extraneous } at the end of the button1ActionPerformed method.
Correct them and it'll work fine. Posting the full source code:
import java.awt.Component;
import java.awt.Checkbox;
public class Frame extends java.awt.Frame
     /** Creates new form Frame */
     public Frame()
          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.
     private void initComponents()
          checkbox1 = new java.awt.Checkbox();
          checkbox2 = new java.awt.Checkbox();
          checkbox3 = new java.awt.Checkbox();
          button1 = new java.awt.Button();
          textField1 = new java.awt.TextField();
          setLayout( null );
          addWindowListener( new java.awt.event.WindowAdapter()
               public void windowClosing( java.awt.event.WindowEvent evt )
                    exitForm( evt );
          checkbox1.setLabel( "checkbox1" );
          add( checkbox1 );
          checkbox1.setBounds( 120, 40, 84, 20 );
          checkbox2.setLabel( "checkbox2" );
          add( checkbox2 );
          checkbox2.setBounds( 120, 60, 84, 20 );
          checkbox3.setLabel( "checkbox3" );
          add( checkbox3 );
          checkbox3.setBounds( 120, 80, 84, 20 );
          button1.setLabel( "button1" );
          button1.addActionListener( new java.awt.event.ActionListener()
               public void actionPerformed( java.awt.event.ActionEvent evt )
                    button1ActionPerformed( evt );
          add( button1 );
          button1.setBounds( 50, 170, 57, 24 );
          textField1.setText( "textField1" );
          add( textField1 );
          textField1.setBounds( 240, 170, 60, 20 );
          pack();
     private void button1ActionPerformed( java.awt.event.ActionEvent evt )
          // Add your handling code here:
          Component[] components = getComponents();
          int numOfCheckBoxes = 0;
          int numChecked = 0;
          for ( int i = 0; i < components.length; i++ )
               if ( components[i] instanceof Checkbox )
                    numOfCheckBoxes++;
                    Checkbox checkBox = (Checkbox) components;
                    if ( checkBox.getState() )
                         numChecked++;
          double ratio = (double) numChecked / (double) numOfCheckBoxes;
          textField1.setText( Double.toString( ratio ) );
     /** Exit the Application */
     private void exitForm( java.awt.event.WindowEvent evt )
          System.exit( 0 );
     * @param args the command line arguments
     public static void main( String args[] )
          new Frame().show();
     // Variables declaration - do not modify
     private java.awt.Button button1;
     private java.awt.Checkbox checkbox1;
     private java.awt.Checkbox checkbox2;
     private java.awt.Checkbox checkbox3;
     private java.awt.TextField textField1;
     // End of variables declaration
I can see from the code that the GUI was generated by a tool. Since you're new to Java programming, I'd recommend ditching the tool and writing everything by hand, otherwise you're not learning much. It's just like when you're learning proofs in Maths, where you start with first principles before making use of the proofs on their own.
Also, it'll help tremendously if you could spend some time going through the Java Tutorial (http://java.sun.com/docs/books/tutorial/). It's free, and I find it very useful.
Hth.