.class vs .java

.class vs .java

A .class file is a compiled .java file.

.java is all text and is human readable.
.class is binary (usually).

You compile a java file into a class file by going to the command line, navigating to the .java file, and running

javac c:thepathtoyourfileyourFileName.java

You must have a java SDK installed on your computer (get it from Oracle), and make sure the javac.exe file is locatable in your computers PATH environment variable.

Also, check out Javas Lesson 1: Compiling & Running a Simple Program

If any of this is unclear, please comment on this response and I can help out 🙂

  • .class -> compiled (for JVM)
  • .java -> source (for humans)

.class vs .java

A .java file contains your Java source code while a .class file contains the Java bytecode produced by the Java compiler. It is your .class files that run on the JVM to execute a Java application.

It is the .class files you will use when you deploy your applet.

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