What is the Contentpane?

A Content Pane is the most basic layout tile. Conceptually, it’s like the content boxes in portals like MyYahoo. A content pane resembles an iframe, but contains extra design features, fits in with the current theme, and renders widgets properly.

What is the difference between JPanel and container?

JPanel actually serves as a general purpose container. It is where more complex, or bigger operations, are usually put. You can put many operations inside one panel. JPanel is a subclass of JComponent, and JComponent is a subclass of Container, therefore, JPanel is also a container.

What is a Contentpane Java?

In Java Swing, the layer that is used to hold objects is called the content pane. Objects are added to the content pane layer of the container. The getContentPane() method retrieves the content pane layer so that you can add an object to it. The content pane is an object created by the Java run time environment.

What is difference between JPanel and JFrame?

Basically, a JFrame represents a framed window and a JPanel represents some area in which controls (e.g., buttons, checkboxes, and textfields) and visuals (e.g., figures, pictures, and even text) can appear.

Can I add JFrame to JPanel?

You could call getContentPane() on the JFrame to extract its main contents as a JPanel (usually) and without the menu bar and decorations, and display that as a JPanel though best would probably be to update the original program so that it produces a JPanel and not a JFrame.

Does JPanel extend JFrame?

You can’t do it. Jpanel and jframe are both classes and java doesn’t support multiple inheritance of classes. Only one class and many interfaces. Don’t extend frame or other top level containers.

Can JPanel contain JFrame?

Being a window, JFrame contains a title bar. While Jpanel does not contain a title bar. JFrame can contain within itself multiple frames and JPanels. But JPanel cannot contain within itself JFrames.

Do jpanel components have contentpane?

To keep you on your toes, some Component s have contentPane s and some do not. in particular JPanel does not. You add to a JPanel the some was as before. Sun saw the error of their ways and now permits you to use JFrame. add and brethren safely in Java 1.5+.

Is there such a class as contentpane in Java?

Note there is no such class as ContentPane . JFrame. getContentPane returns a vanilla Container. JApplet, JDialog , JFrame, JInternalFrame , JOptionPane and JWindow all suffer from this contentPane gotcha.

What is contentpane in JFrame?

ContentPane (or Content Pain?) JFrames have a content pane, which holds the components. These components are sized and positioned by the layout manager when JFrame’s pack () is called. Content pane border.

What is getcontentpane () in JComponent?

getContentPane () returns a Container object. This isn’t really a plain Container object, but is actually a JPanel! This is a Container as a consequence of the hierarchy. So if we get the predefined content pane, it turns out it’s actually a JPanel, but we really can’t take advantage of the functionality that was added by JComponent.