Swing components are written entirely in Java. They are "lightweight," meaning they look and behave consistently across Windows, macOS, and Linux without relying on the host operating system's native GUI platform.
You will get hands-on experience building layouts with standard widgets: swing a beginner39s guide herbert schildt pdf
jfrm.add(jlab) : In older iterations of Java, components had to be explicitly added via jfrm.getContentPane().add() . Modern Java implicitly forwards .add() calls to the content pane automatically. Mastering Event Handling Swing components are written entirely in Java