Java 6 Illuminated: An Active Learning Approach, 2nd Edition

4.1 Applet Structure 177

with the low temperatures shown in blue, the moderate temperatures

shown in yellow, and the high temperatures shown in red.

In this chapter, we begin by adding graphical output to applets. Later, when

we cover GUIs in Chapter 12, we’ll show you how to add graphical output

to a Java application.

4.1 Applet Structure

The JApplet class, an existing Java class of the javax.swing package, provides

the basic functionality of an applet. An applet class that we write is an

extension of the JApplet class. In Java, the extends keyword specifies that

one class is an extension of another and inherits the properties of the other

class. Inheritance ...