I am creating a basic GUI frame. The frame has 10 radio buttons and a Submit button. The user selects one option(JRadioButtons) and clicks on the Submit(JButton) button. On clicking the Submit button, the option selected by the user appears on a different frame.
I want the Submit button to recognize the JRadioButton selected by the user. I have put my bit of code here for reference.
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class Frame2 extends JFrame{
private JFrame frame2;
private JLabel label2;
private JButton button2;
private JRadioButton r1;
private JRadioButton r2;
private JRadioButton r3;
private JRadioButton r4;
private JRadioButton r5;
private JRadioButton r6;
private JRadioButton r7;
private JRadioButton r8;
private JRadioButton r9;
private JRadioButton r10;
public ButtonGroup group;
Frame2(){
setLayout(new BorderLayout());
setSize(new Dimension(1304,690));
getContentPane().setBackground(Color.DARK_GRAY);
label2= new JLabel(" Choose a topic: ");
label2.setFont(new Font("Seriff",Font.BOLD, 14));
label2.setForeground(Color.WHITE);
button2=new JButton("Submit");
add(label2, BorderLayout.NORTH);
JPanel centerPanel = new JPanel(new GridLayout(2, 5));
centerPanel.add(r1=new JRadioButton("Introduction"));
centerPanel.add(r2=new JRadioButton("Class and Objects"));
centerPanel.add(r3=new JRadioButton("Object Oriented Programming Concepts"));
centerPanel.add(r4=new JRadioButton("JAVA literals, constants, variables"));
centerPanel.add(r5=new JRadioButton("Loops"));
centerPanel.add(r6=new JRadioButton("Functions/Methods"));
centerPanel.add(r7=new JRadioButton("Strings"));
centerPanel.add(r8=new JRadioButton("Arrays"));
centerPanel.add(r9=new JRadioButton("Time Complexity"));
centerPanel.add(r10=new JRadioButton("Data Structures"));
add(centerPanel, BorderLayout.CENTER);
group= new ButtonGroup();
group.add(r1);
group.add(r2);
group.add(r3);
group.add(r4);
group.add(r5);
group.add(r6);
group.add(r7);
group.add(r8);
group.add(r9);
group.add(r10);
add(button2, BorderLayout.SOUTH);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(e.getSource()==button2) {
Layouts l=new Layouts();
l.main(null);
dispose();
}
}
});
}
public static void main(String[] args) {
Frame2 fr2=new Frame2();
}
}`
Thanks in advance.
It's a lot easier if you put the JRadioButtons in an array.
Here are the changes I made to your code to make it easier to modify and understand.
I added a call to the SwingUtilities invokeLater method to ensure the creation and execution of the Swing components happens on the Event Dispatch Thread.
I created the individual JPanels in methods. By separating the JPanel code, I could more easily focus on one part of the GUI at a time.
The methods to construct a JFrame must be called in the proper order. You have to create all the Swing components before you make the JFrame visible.
Here's one way to connect a JButton with a group of JRadioButtons.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.SwingUtilities;
public class RadioButtonTest {
private JButton button2;
private JRadioButton[] rb;
private ButtonGroup group;
public RadioButtonTest() {
JFrame frame = new JFrame("Java Tutorials");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBackground(Color.DARK_GRAY);
frame.add(createMainPanel());
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private JPanel createMainPanel() {
JPanel panel = new JPanel(new BorderLayout());
JLabel label2 = new JLabel(" Choose a topic: ");
label2.setFont(new Font("Seriff", Font.BOLD, 14));
label2.setForeground(Color.WHITE);
panel.add(label2, BorderLayout.NORTH);
panel.add(createButtonPanel(), BorderLayout.CENTER);
button2 = new JButton("Submit");
button2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == button2) {
for (int i = 0; i < rb.length; i++) {
if (rb[i].isSelected()) {
String text = rb[i].getText();
System.out.println(text);
// Do your second JFrame
}
}
}
}
});
panel.add(button2, BorderLayout.SOUTH);
return panel;
}
private JPanel createButtonPanel() {
JPanel centerPanel = new JPanel(new GridLayout(0, 2));
String[] titles = { "Introduction", "Class and Objects",
"Object Oriented Programming Concepts",
"JAVA literals, constants, variables", "Loops",
"Functions/Methods", "Strings", "Arrays",
"Time Complexity", "Data Structures" };
rb = new JRadioButton[titles.length];
group = new ButtonGroup();
for (int i = 0; i < titles.length; i++) {
rb[i] = new JRadioButton(titles[i]);
group.add(rb[i]);
centerPanel.add(rb[i]);
}
return centerPanel;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new RadioButtonTest();
}
});
}
}