JAVA GUI – How To Make Only One Checkbox Checked At A Time Using Netbeans

JAVA GUI – How To Make Only One Checkbox Checked At A Time Using Netbeans

To make only one button selected on java GUI Application :

Step 1. Drag a button group from the pallete to the jframe.
Step 2. Highlight all checkboxes (Select all Checkboxes by holding the mouse and dragging it till all the checkboxes are highlighted)
Step 3. Go to properties.
Step 4. Locate Button Group
Step 5. On the right side select the button group you want to add checkboxes to, from the dropdown list.

/*
 * How To Make Only One Checkbox Checked At A Time Using Netbeans
 */
package checkonecheckboxatatime;

import com.sun.org.apache.bcel.internal.generic.IFEQ;

/**
 *
 * @author Genuine
 */
public class CheckOneCheckboxAtATime extends javax.swing.JFrame {

    /**
     * Creates new form CheckOneCheckboxAtATime
     */
    public CheckOneCheckboxAtATime() {
        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() {

        buttonGroup1 = new javax.swing.ButtonGroup();
        jCheckBox1 = new javax.swing.JCheckBox();
        jCheckBox2 = new javax.swing.JCheckBox();
        jCheckBox3 = new javax.swing.JCheckBox();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        buttonGroup1.add(jCheckBox1);
        jCheckBox1.setText("Java");
        jCheckBox1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jCheckBox1ActionPerformed(evt);
            }
        });

        buttonGroup1.add(jCheckBox2);
        jCheckBox2.setText("PHP");
        jCheckBox2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jCheckBox2ActionPerformed(evt);
            }
        });

        buttonGroup1.add(jCheckBox3);
        jCheckBox3.setText("c#");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(37, 37, 37)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jCheckBox1)
                    .addComponent(jCheckBox3)
                    .addComponent(jCheckBox2))
                .addContainerGap(314, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(28, 28, 28)
                .addComponent(jCheckBox1)
                .addGap(18, 18, 18)
                .addComponent(jCheckBox2)
                .addGap(18, 18, 18)
                .addComponent(jCheckBox3)
                .addContainerGap(167, Short.MAX_VALUE))
        );

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

    private void jCheckBox2ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
    }                                          

    private void jCheckBox1ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
    }                                          

    /**
     * @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 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(CheckOneCheckboxAtATime.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(CheckOneCheckboxAtATime.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(CheckOneCheckboxAtATime.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(CheckOneCheckboxAtATime.class.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 CheckOneCheckboxAtATime().setVisible(true);
            }
        });
    }


    // Variables declaration - do not modify                     
    private javax.swing.ButtonGroup buttonGroup1;
    private javax.swing.JCheckBox jCheckBox1;
    private javax.swing.JCheckBox jCheckBox2;
    private javax.swing.JCheckBox jCheckBox3;
    // End of variables declaration                   
}