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What are the functional differences between a .class file, a .jar file, and a .java file that defines a class structure in eclipse and when is it appropriate to use each file type?
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java files are the source-code, and . jar files contain the compressed and packaged compiled .
A . java file contains your Java source code while a . class file contains the Java bytecode produced by the Java compiler.
You can use JAR files to store class files. The class file does not target a specific hardware platform, but instead targets the Java virtual machine architecture. You can use JAR as a general archiving tool and also to distribute Java programs of all types, including applets.
FYI: In simple terms, the difference between a JAR file and a Runnable JAR is that while a JAR file is a Java application which requires a command line to run, a runnable JAR file can be directly executed by double clicking it.
A .java file contains Java code.
A .class file is the .java file compiled
A .jar file is an executable java package.
Eclipse compiles .java files to create .class files and you can package them in an executable .jar file.
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