Java Source Code File
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What is a JAVA file?
A JAVA file is a source code file written in the Java programming language, which was originally developed by Sun Microsystems but is now maintained by Oracle. It uses an object-oriented approach, where structured data types, called classes, are used to instantiate objects at runtime.
JAVA source code files are compiled into .CLASS files using a Java compiler (javac command). A CLASS file contains bytecode that can be executed by the Java Virtual Machine (JVM). The JVM can be downloaded for every major operating system, including Windows, macOS, and Linux.
NOTE: Android programs are written in Java but are run using the Dalvik Virtual Machine (DVM), which is a different virtual machine than the standard JVM that is optimized for Android.