Java How to Program (early objects), 9/e

2.2 Your First Program in Java: Printing a Line of Text

A Java application is a computer program that executes when you use the java command to launch the Java Virtual Machine (JVM). Later in this section we’ll discuss how to compile and run a Java application. First we consider a simple application that displays a line of text. Figure 2.1 shows the program followed by a box that displays its output. The program includes line numbers. We’ve added these for instructional purposes—they’re not part of a Java program. This example illustrates several important Java features. We’ll see that line 9 does the real work—displaying the phrase Welcome to Java Programming! on the screen.

Fig. 2.1 Text-printing program

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