In a Java Swing, A JFrame is the class that represents the window in which graphics applications running on Java. JFrame Class is the top-level container that contains content pane all visible components contain in the content pane. The usual procedure to be used to create a new class that inherits from JFrame. Normally JFrame's are used as primary containers, that is, not contained in other containers.
A frame is often put a main panel from which the other elements are organized. To place this main panel method is used.
public void setContentPane(Cantainer contentPane)
public class JFrameContentPane extends JFrame
private final int SIZE = 200;
private Container con = getContentPane();
private JButton BtnClckIt = new JButton("Click it");
super("JFrame ContentPane Layout in Java Swing Example");
public static void main(String args)
JFrameContentPane JFrameCP = new JFrameContentPane();