thebbqcode

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
public class DynamicCheckBox extends JFrame implements ActionListener {
 
    private DynamicCheckBox()
    {
        super("Dynamic Check Box Tester");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLayout( new BorderLayout() );
        setSize( 200, 300 );
 
        initComponents();  // originall with one
    }
 
    private void initComponents( )
    {
 
        // Get the first panel setup
        p1 = new JPanel();
        p1.setLayout(new GridLayout( 1, 2) );       
 
        input = new JTextField();               
        btn = new JButton("Go");
        btn.addActionListener(this);
 
        p1.add( input );    // add our components to first JPanel
        p1.add( btn  );
 
        // this is for a panel of checkboxes //
        // we will hopefull dynamically set it up
        p2 = new JPanel();
        p2.setLayout( new GridLayout( 1, 1) );
        p2.add( new JCheckBox("CheckBox"));
 
        this.add( p1, BorderLayout.NORTH );
        this.add( p2, BorderLayout.SOUTH );
        setVisible(true);
    }
 
    private void updateP2( int noOfCheckBoxes )
    {       
        // add our checkBoxes
        p2.setLayout( new GridLayout( noOfCheckBoxes, 1, 4, 4) );
 
        for ( int i = 0; i < noOfCheckBoxes; i++ )
        {
            //boxes.add( new JCheckBox() );
            p2.add( new JCheckBox( "This is " + i ));
        }
        //this.add(p2, BorderLayout.SOUTH );
    }
    public void actionPerformed(ActionEvent e)
    {
        if ( e.getSource() == btn )
        {
            try
            {
                int q = Integer.parseInt( input.getText() );
                //this.remove( p2 );
                p2.removeAll();
                p2.updateUI();
                updateP2( q );
 
 
            } catch (Exception err)   {
                input.setText( err.getMessage() );
                return;
            }
        }
    }
 
    public static void main(String[] args)
    {
        new DynamicCheckBox();
    }
 
    // components
    private JPanel p1, p2;
    private JTextField input;
    private JButton btn;    
 
}