The javac Compiler
javac, the Java compiler, converts Java source code into one or more class files of bytecode that can be run by a Java interpreter.
Java source code is stored in a file with the .java file extension. This file can be created with any text editor or word processor that can save a document without any special formatting codes. The terminology varies depending on the text-editing software being used, but these files are often called plain text, ASCII text, DOS text, or something similar.
A Java source code file can contain more than one class, but only one of the classes can be declared to be public. A class can contain no public classes at all if desired, although this isn't possible with applets because of the rules of inheritance. ...
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