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Chapter 17: Problem 11

What method applets use to receive strings from html files? a. getValue 0 b. getParameter() c. \(\operatorname{get}()\) d. None of the above

Short Answer

Expert verified
b. getParameter()

Step by step solution

01

Read the Question Carefully

Understand what is being asked. The question is about the method applets use to receive strings from HTML files.
02

Recall Applet Methods

Remember the methods that applets use to interact with HTML parameters. One of these methods is used for retrieving string values from HTML.
03

Eliminate Incorrect Options

Look at the provided options and eliminate the ones that are not relevant. Options a and c do not match any standard applet method.
04

Identify the Correct Method

Option b, getParameter(), is the correct method that applets use to receive strings from HTML files.

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Key Concepts

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

HTML parameters
HTML parameters play an essential role in defining how Java applets interact with web pages. They provide a way to pass information from an HTML document to an embedded applet. For instance, you can use the tag within an tag to specify parameters.
Here's an example to illustrate:
This creates an HTML parameter called `bgColor` with the value `blue`. HTML parameters are critical for customizing the behavior of applets based on the needs of the web page.
By using parameters, you can enable dynamic changes, making applets more flexible and useful.
getParameter method
The getParameter method in Java applets is crucial for retrieving values passed from HTML parameters. This method allows applets to read and use these parameters, integrating web page data seamlessly.
When you call getParameter with the name of the parameter, it returns its value as a string. If the parameter doesn't exist, it returns null.
Here’s an example of how to use getParameter:
  • String bgColor = getParameter('bgColor');
This code retrieves the value of the 'bgColor' parameter set in the HTML. The getParameter method makes it easy to change applet behaviors based on the HTML data, ensuring the applet can respond dynamically to different setups.
Remember, always check for null values to avoid null pointer exceptions and handle missing parameters gracefully.
Java applets
Java applets are small programs that can be embedded into web pages, offering rich interactive features that HTML alone cannot provide. They are written in Java and run in a web browser using the Java Plug-in. Applets are particularly useful for creating dynamic content, such as games, data visualization, or custom user interface components.
Here are some key points about Java applets:
  • They run in a sandbox environment, enhancing security.
  • Applets can interact with users and perform complex computations.
  • They rely on the Java runtime environment (JRE) to execute within a browser.
To use an applet, you must include it in an HTML file using the tag along with any necessary parameters. This allows the applet to initialize correctly and interact with the web page as required.
However, with advancements in web technologies like HTML5, JavaScript, and CSS, the use of applets has declined. It's essential to know how applets work, as they laid the groundwork for modern interactive web applications.

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Most popular questions from this chapter

How many param tags can applet tag have? a. 1 b. 2 c. 3 d. Any number of tags

JApplet has been designed for a. Client side programming b. Server side programming c. Middleware programming d. None of the above

What is the default layout manager for JApplet? a. FlowLayout b. BorderLayout c. GridLayout d. BoxLayout

[Tic-Tac-Toe] Create an applet for Tic-Tac-Toe game. Use 9 (3\times3) buttons to represent \(\mathrm{X}\) and O symbols. Create a text field to collect player name and a button to start a new game.

Which of the following are true about JApplet? a. JApplet can run inside a web browser b. JApplets can download web pages c. JAppets display documents and images and play audio clips d. JApplet can communicate with other applets e. All of the above
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