Android™ How to Program, Second Edition

A.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). First we consider a simple application that displays a line of text. Figure A.1 shows the program followed by a box that displays its output.

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 1   // Fig. A.1: Welcome1.java 2   // Text-printing program. 3  4   public class Welcome1 5   { 6      // main method begins execution of Java application 7      public static void main( String[] args ) 8      { 9         System.out.println( "Welcome to Java Programming!" );10      } // end method main11   } // end class Welcome1

Welcome to Java Programming!

Fig. A.1 | Text-printing program. ...