public class HelloWorld
extends Object
Compilation: javac HelloWorld.java
Execution: java HelloWorld
Prints "Hello, World". By tradition, this is everyone's first program.
% java HelloWorld
Hello, World
These 17 lines of text are comments. They are not part of the program;
they serve to remind us about its properties. The first two lines tell
us what to type to compile and test the program. The next line describes
the purpose of the program. The next few lines give a sample execution
of the program and the resulting output. We will always include such
lines in our programs and encourage you to do the same.