This section contains the detail about Swing's Jframe in java.
Working with JFrame
JFrame is a Window with border, title, buttons, menu bar and user-specified components. The components added to the frame are referred to as its contents; these are managed by the contentPane. JFrame objects store several objects including a Container object known as the content pane. To add a component to a JFrame, add it to the content pane.
By default, a JFrame is displayed in the upper-left corner of the screen. To display a frame at a specified location, you can use the setLocation(x, y) method in the JFrame class.
JFrame Constructors
| Constuctors | Description |
| JFrame() | Constructs a new frame that is initially invisible. |
| JFrame(GraphicsConfiguration gc) | Creates a Frame in the specified GraphicsConfiguration of a screen device and a blank title. |
| JFrame(String title) | Creates a new, initially invisible Frame with the specified title. |
| JFrame(String title, GraphicsConfiguration gc) | Creates a JFrame with the specified title and the specified GraphicsConfiguration of a screen device. |
Example :
package corejava;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JFrameTest {
public static void main(String s[]) {
JFrame frame = new JFrame("JFrame Source Demo");
// Add a window listner for close button
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
// This is an empty content area in the frame
JLabel jlbempty = new JLabel("This is JLabel");
jlbempty.setPreferredSize(new Dimension(275, 100));
frame.getContentPane().add(jlbempty, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
}
Output :
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