Working With a Radio Button in Swing

Introduction

In this article, we are going to describe how to use a radio button in your application; you will learn how to create a Radio Button in the frame. The Java AWT top-level window is represented by the CheckBoxGroup. A Java program provides you the CheckboxGroup. In this program, you will see how to create and show the Checkboxgroup component in the frame.

In this program, a radio button is created that is an item that can be selected or deselected and displays that state to the user. Here we are creating a group of buttons in which you can select only one option at a time. Here, the explanation for the procedure of inserting a checkbox group on the Java AWT frame.

For creating radio buttons you need some important steps.

Step 1 - Import the necessary package.

import java.awt.*;
import java.awt.event.*;

Step 2 - Create a frame and label and CheckBoxGroup.

Frame fm=new Frame("RedioButton Group");
Label la=new Label("What is your choice:");
CheckboxGroup cg1=new CheckboxGroup();

Step 3 - Add the component to the frame.

fm.add(la);
fm.add(new Checkbox("MCA", cg1, true));
fm.add(new Checkbox("B-tech", cg1, false));
fm.add(new Checkbox("MBA", cg1, false));
fm.add(new Checkbox("CA", cg1, false));
fm.setSize(250,200);
fm.setVisible(true);

Step 4 - Create the listener class.

fm.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
System.exit(0);
}
});

Step 5 - We create everything in the main method; now we close the main method and there is no need to create an object of my class.

Complete code

import java.awt.*;
import java.awt.event.*;
public class MyRadioButton
{
public static void main(String[] args)
{
Frame fm = new Frame("RedioButton DEMO");
Label la = new Label("Slect your Degree:");
fm.setLayout(new GridLayout(0, 1));
CheckboxGroup cg1 = new CheckboxGroup();
fm.add(la);
fm.add(new Checkbox("MATH", cg1, true));
fm.add(new Checkbox("PHYSICS", cg1, false));
fm.add(new Checkbox("CHEMISTRY", cg1, false));
fm.add(new Checkbox("ENGLISH", cg1, false));
fm.setSize(250, 200);
fm.setVisible(true);
fm.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent we)
{
System.exit(0);
}
});
}
}

OUTPUT

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