RadioButton in Java AWT

Radio buttons provide a more user friendly environment for selecting only one option among many. It is a special kind of checkbox that is used to select only one option.

This is a Java program that demonstrates the use of Radio Buttons in AWT (Abstract Window Toolkit) for creating a simple GUI application.

The program creates a window using the Frame class and sets its size and layout. It then creates two Checkbox objects with a CheckboxGroup object to make them mutually exclusive. Two Label objects are created to display the state of the selected Checkbox object.
The program adds ItemListener objects to each Checkbox object to detect when its state changes (i.e., when it is selected or deselected). When a Checkbox is selected, its corresponding Label is updated to display the state change, and the other Label is set to "unchecked".
Finally, the program adds the Checkbox and Label objects to the window and sets a WindowAdapter object to handle the closing of the window when the user clicks on the close button.

Overall, this program shows how to use Radio Buttons in AWT to create a simple GUI application with event handling.

Source Code

package awtDemo;
 
import java.awt.*;
import java.awt.event.*;
//RadioButton in AWT
class MyApp  extends Frame{
 
	Label l1,l2;
	Checkbox c1, c2;
	CheckboxGroup cbg;
 
	public MyApp() {
		super("Tutor Joes");
		setSize(1000,600);//w,h
		setLayout(null);
		setVisible(true);
 
 
		cbg = new CheckboxGroup();
 
		c1 = new Checkbox("Male",cbg,false);
		c1.setBounds(10, 50, 250, 30);
 
		l1 = new Label("Not Selected");
		l1.setBounds(300, 50, 600, 30);
 
		c2 = new Checkbox("Female",cbg,false);
		c2.setBounds(10, 100, 250, 30);
 
		l2=new Label("Not Selected");
		l2.setBounds(300,100,600,30);
 
		c1.addItemListener(new ItemListener() {
			public void itemStateChanged(ItemEvent e) {
				l1.setText((e.getStateChange() == 1 ? "checked" : "unchecked"));
				l2.setText("unchecked");
			}
		});
		c2.addItemListener(new ItemListener() {
			public void itemStateChanged(ItemEvent e) {
 
				l1.setText("unchecked");
				l2.setText((e.getStateChange() == 1 ? "checked" : "unchecked"));
			}
		});
 
		add(c1);
		add(l1);
		add(c2);
		add(l2);
 
		//Close Button Code
		this.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent we) {
				System.exit(0);
			}
		});
	}
}
public class app{
	public static void main(String[] args) {
		MyApp frm=new MyApp();
	}
 
}

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RadioButton in Java AWT

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