Java Swing Program to demonstrate JCheckBox with Text

Program

import javax.swing.*;
public class JCheckBoxDemo
{
    public static void main(String[] args)
    {
        JFrame frm = new JFrame("JCheckBox Demo");
        JCheckBox chkbxMilk = new JCheckBox();
        chkbxMilk.setText("Milk");
        chkbxMilk.setSelected(true);
        chkbxMilk.setBounds(0, 0, 100, 50);
        JCheckBox chkbxCoffee = new JCheckBox();
        chkbxCoffee.setText("Coffee");
        chkbxCoffee.setBounds(0, 50, 100, 50);
        JCheckBox chkbxTea = new JCheckBox();
        chkbxTea.setText("Tea");
        chkbxTea.setBounds(0, 100, 100, 50);
        frm.add(chkbxMilk);
        frm.add(chkbxCoffee);
        frm.add(chkbxTea);
        frm.setSize(300, 300);
        frm.setLayout(null);
        frm.setVisible(true);
        frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

This Java Swing program demonstrates the use of JCheckBox components to create a simple UI with selectable options. The program creates a simple GUI with three checkboxes allowing users to select or deselect options.

1. JFrame Setup:

   • A JFrame named frm is created with the title "JCheckBox Demo."
   • The JFrame is set to close the application when the window is closed using setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE).

2. JCheckBox Components:

   • Three JCheckBox components are created to represent options ("Milk," "Coffee," and "Tea").
   • Each checkbox:
     • Is created using new JCheckBox().
     • Has its label set using setText().
     • Has a specific position and size set using setBounds().
   • The checkbox for "Milk" is pre-selected using setSelected(true).

3. Adding Checkboxes to JFrame:

   • Each JCheckBox is added to the frame using frm.add().
   • The application uses a default static behavior with no event handling for the checkboxes. To add interactivity, event listeners (e.g., ItemListener) can be used.

4. Frame Configuration:

   • The frame size is set to 300x300 pixels using setSize().
   • A null layout is used for manual positioning of components with setLayout(null).
   • The frame is made visible with setVisible(true).
   • Manual positioning is achieved using setBounds(), though using layout managers (like FlowLayout or BoxLayout) would be a better approach for dynamic UIs.

Output