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51: Mainline

To initiate compilation on a Windows system, you open a window. Next, you type the following, assuming that your class definition is in a source file named Demonstrate.java:

javac Demonstrate.java 

Such a line is called a command line. The example command line has two parts:

  *-- Name of the Java compiler 
  | 
  |     *-- Source file's name and extension 
  |     v 
  v   ---------------- 
javac Demonstrate.java 

The Java compiler places the resulting byte code in a file named Demonstrate.class.