Radiobutton.java

import java.awt.*; 
import javax.swing.*; 
import java.awt.event.*; 
  
class Demo extends JFrame { 
  
    // Declaration of object of JRadioButton class. 
    JRadioButton jRadioButton1; 
  
    // Declaration of object of JRadioButton class. 
    JRadioButton jRadioButton2; 
  
    // Declaration of object of JButton class. 
    JButton jButton; 
  
    // Declaration of object of ButtonGroup class. 
    ButtonGroup G1; 
  
    // Declaration of object of  JLabel  class. 
    JLabel L1; 
  
    // Constructor of Demo class. 
    public Demo() 
    { 
  
        // Setting layout as null of JFrame. 
        this.setLayout(null); 
  
        // Initialization of object of "JRadioButton" class. 
        jRadioButton1 = new JRadioButton(); 
  
        // Initialization of object of "JRadioButton" class. 
        jRadioButton2 = new JRadioButton(); 
  
        // Initialization of object of "JButton" class. 
        jButton = new JButton("Click"); 
  
        // Initialization of object of "ButtonGroup" class. 
        G1 = new ButtonGroup(); 
  
        // Initialization of object of " JLabel" class. 
        L1 = new JLabel("Qualification"); 
  
        // setText(...) function is used to set text of radio button. 
        // Setting text of "jRadioButton2". 
        jRadioButton1.setText("Under-Graduate"); 
  
        // Setting text of "jRadioButton4". 
        jRadioButton2.setText("Graduate"); 
  
        // Setting Bounds of "jRadioButton2". 
        jRadioButton1.setBounds(120, 30, 120, 50); 
  
        // Setting Bounds of "jRadioButton4". 
        jRadioButton2.setBounds(250, 30, 80, 50); 
  
        // Setting Bounds of "jButton". 
        jButton.setBounds(125, 90, 80, 30); 
  
        // Setting Bounds of JLabel "L2". 
        L1.setBounds(20, 30, 150, 50); 
  
        // "this" keyword in java refers to current object. 
        // Adding "jRadioButton2" on JFrame. 
        this.add(jRadioButton1); 
  
        // Adding "jRadioButton4" on JFrame. 
        this.add(jRadioButton2); 
  
        // Adding "jButton" on JFrame. 
        this.add(jButton); 
  
        // Adding JLabel "L2" on JFrame. 
        this.add(L1); 
  
        // Adding "jRadioButton1" and "jRadioButton3" in a Button Group "G2". 
        G1.add(jRadioButton1); 
        G1.add(jRadioButton2); 
  
        // Adding Listener to JButton. 
        jButton.addActionListener(new ActionListener() { 
            // Anonymous class. 
  
            public void actionPerformed(ActionEvent e) 
            { 
                // Override Method 
  
                // Declaration of String class Objects. 
                String qual = " "; 
  
                // If condition to check if jRadioButton2 is selected. 
                if (jRadioButton1.isSelected()) { 
  
                    qual = "Under-Graduate"; 
                } 
  
                else if (jRadioButton2.isSelected()) { 
  
                    qual = "Graduate"; 
                } 
                else { 
  
                    qual = "NO Button selected"; 
                } 
  
                // MessageDialog to show information selected radion buttons. 
                JOptionPane.showMessageDialog(Demo.this, qual); 
            } 
        }); 
    } 
} 
  
class RadioButton { 
    // Driver code. 
    public static void main(String args[]) 
    { // Creating object of demo class. 
        Demo f = new Demo(); 
  
        // Setting Bounds of JFrame. 
        f.setBounds(100, 100, 400, 200); 
  
        // Setting Title of frame. 
        f.setTitle("RadioButtons"); 
  
        // Setting Visible status of frame as true. 
        f.setVisible(true); 
    } 
}