The same is true for how Swing interprets the z-order of lightweight and heavyweight components, even in a container. If a heavyweight component is added to a container that has lightweight components, the heavyweight will always be on top; the lightweight components must share the same z-order as the parent container.
In addition, lightweight components cannot draw themselves outside the container easel they reside in, or they will be clipped. All Swing components are so-called "lightwight" components because they are written in java. If for example you run Swing application and try to analyze it using UI analyzing tool e.
WinSpy in windows you see only one element: the window JFrame itself. All other components are drawn from OS point of view. Since java must be portable among various operating system AWT is very limited.
It implements only the minimal subset of screen elements supported by all platforms. However the AWT elements are mapped directly to the appropriate platform elements, so UI discovery tool will see them. These elements are named "heavy weight". Where lightweight components like "Swing" components are drawn by java and don't rely on native GUI.
Because of this feature they provide a consistent look and feel on all platforms. AWT libraries require the support of native graphics libraries and some of their GUI components look different on different platforms. Moreover, Swing components are not inherently Thread safe, you explicitly have to write synchronized code to manipulate or redraw them whereas AWT components can be trusted in a multithreaded environment. AWT Components are called heavyweight components because of their dependency on native libraries.
Swing components are called lightweight due to their independence of native libraries. Hence Swing operations are much faster because each and every operation is taken care by the Java runtime env and no delegation of events or commands to the native libraries is required. A JFrame is a Swing container with an interface box, and can be a standalone application it has the top box with abilities to minimize, maximize, and exit whereas a JPanel is everything a JFrame is a Swing container minus the ability to be a standalone.
Currently EJB container because it is provided by default for the application EJB specification all functions can be , so it belongs to the heavyweights. In addition: lightweight components are drawn with JAVA code, which has platform portability, while heavyweight components are components drawn by calling functions of the operating system.
For example, the main form generally uses lightweight components as much as possible. The portability of the program is very good. Generally, the components in the javax. The java. Swing components are light-weight components implemented in Java.
There is no native code and no dependence on operating system support. This is the biggest difference between it and AWT components. Swing performs consistently on different platforms and has the ability to provide other features not supported by the native window system.
A heavyweight component is associated with its own native screen resource commonly known as a peer. Components from the java. Several Swing components are heavyweight components. Swinging increases spatial awareness. Swinging helps develop gross motor skills—pumping legs, running, jumping.
Swinging helps develop fine motor skills—grip strength, hand, arm and finger coordination. Swing is a GUI widget toolkit for Java. Instead, they are written entirely in Java and therefore are platform-independent. This class creates a labeled button.
A JColorChooser provides a pane of controls designed to allow a user to manipulate and select a color. A JCheckBox is a graphical component that can be in either an on true or off false state.
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