Create a JFrame

Source code below will show you how to create a java common window using JFrame class.

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

public class CreateAJFrame
{
public static void main(String[]args)
{
 //Create a window with title "My first window"
 JFrame frame=new JFrame("My first window");

 //Set close operation when user click window close button
 //Window close button here is button at the top right of the window
 //with 'x' sign
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 //Set size for window.In this case we set 300 pixel width and 300 pixel height
 frame.setSize(300,300);

 //Make your window visible
 frame.setVisible(true);

}
}

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JUST COMPILE AND EXECUTE IT
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