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Chapter 17: Problem 22

Can applet tag appear inside JApplet class? a. Yes b. No c. Yes-but as a comment statement only d. None of the above

Short Answer

Expert verified
No, the tag cannot appear inside the JApplet class.

Step by step solution

01

Understand the Question

The question is asking whether the HTML tag appears inside the Java JApplet class.
02

Review the Purpose of JApplet

JApplet is a class in the javax.swing package that allows applets to be created using the Swing GUI components.
03

Understand the Function of Tag

The tag is used in HTML to embed a Java applet in a web page.
04

Determine the Context

Since JApplet is a Java class and is an HTML tag, they operate in different contexts. JApplet is used within Java code, while is used in HTML code.
05

Conclude the Answer

Since the tag is for HTML and cannot appear in Java source code as executable code, it cannot be directly inside the JApplet class, but could be used in HTML surrounding the applet.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Swing GUI
Swing is a part of Java's standard library that provides a robust set of GUI components. It is based on the Abstract Window Toolkit (AWT) but offers more sophisticated and flexible GUI components. The JApplet class in the Swing library is used to create applets using these components.

The key features of Swing include:
  • Lightweight Components: These are more efficient because they are not dependent on native GUI libraries.
  • Pluggable Look and Feel: You can change the appearance of Swing applications without modifying their underlying code.
  • Event-Driven Programming: This makes it easy to handle user actions like clicking a button or entering data.
  • MVC Architecture: Swing follows the Model-View-Controller (MVC) design pattern, ensuring a clear separation of concerns.
Swing provides a powerful toolset for creating complex desktop applications and also boosts the functionality of applets through the JApplet class.
HTML applet tag
The tag is an HTML element that was used to embed small Java programs (applets) into web pages. Although it is now deprecated in HTML5 and replaced by the and tags, understanding it is important to grasp the historical context of Java applets.

Here's a basic example of how the tag looks:


Key attributes of the tag include:
  • **code**: Specifies the name of the applet's compiled Java class file.
  • **width** and **height**: Define the dimensions of the applet display area.
  • **codebase**: Optional; it specifies the base URL of the applet code.
The tag was the mechanism to bring the functionalities of Java to web pages, but this method is now outdated. Despite this, the historical understanding of the tag helps to appreciate newer technologies and transitions.
Java applet embedding
Embedding Java applets in web pages was a common practice in the late 1990s and early 2000s to add interactive elements using Java. This practice utilized tags in HTML.

Steps to embed a Java applet: