AWT Graphics gives an idea about

• CUI and GUI
• Advantages of GUI

As discussed in the previous chapter, a user can interact with a Java program in two ways-using commands and mouse clicks. These ways can be officially termed as

The below figure clearly shows the difference.

Command User Interface lets the user to interact with a Java program using commands in the command prompt. It is time taking process and needs much effort while communicating.

Graphical User Interface lets the user to interact with a Java program using the graphic window. GUI can be built by including java.awt package, which provides pre-defined classes to GUI.

• A user can easily operate GUI applications as they are user friendly compared to CUI.
• GUI enables the user to perform multiple operations at a time, whereas, this is not possible in CUI.
• High speed is one of the main advantages of GUI control.
• An application can be operated in just a click using GUI, whereas, in CUI, a number of commands have to be inputted to complete the action.

The classes that are pre-defined in java.awt package and used to perform output actions are called as Container classes. These classes helps in displaying output to the end-user with the help of frame and panel.

The classes that are pre-defined in java.awt package and used to perform input actions are called as Non-Container classes. These classes helps the end-user to communicate with the Java application with the help of labels, and buttons.

The following are a few real-time applications that use GUI interface:

• Mobile Applications
• Banking Applications
• Air Ticket System
• ATM

• GUI is Graphical User Interface.
• It imports java.awt package.
• GUI applications are mostly used in real-time.
• Container class and Non-container class are the types of classes.