JRadioButton select at start

Complete source code below will show you, how to make JRadioButton select at start.

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COMPLETE SOURCE CODE FOR : RadioButtonSelectAtStart.java
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import javax.swing.JRadioButton;
import javax.swing.JFrame;

import java.awt.FlowLayout;

public class RadioButtonSelectAtStart
{
public static void main(String[]args)
{
 //Create radio button with select at start
 //You can make this radio button not select on start by change true to false
 JRadioButton radioButton=new JRadioButton("I am a radio button",true);


 //Create a window using JFrame with title ( JRadioButton select on start )
 JFrame frame=new JFrame("JRadioButton select on start");

 //Set JFrame layout
 frame.setLayout(new FlowLayout());

 //add created radio button into JFrame
 frame.add(radioButton);

 //Set default close operation for JFrame
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 //Set JFrame size
 frame.setSize(200,65);

 //Make JFrame visible
 frame.setVisible(true);
}
}

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JUST COMPILE AND EXECUTE IT
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