List of Java class file format major version numbers

Question

I saw this list of major version numbers for Java in another post    Java 1 2 uses major version 46 Java 1 3 uses major version 47 Java 1 4 uses major version 48 Java 5 uses major version 49 Java 6 uses major version 50 Java 7 uses major version 51 Java 8 uses major version 52 Java 9 uses major version 53 Java 10 uses major version 54 Java 11 uses major version 55 Java 12 uses major version 56 Java 13 uses major version 57 Java 14 uses major version 58 Java 15 uses major version 59   Where does this list come from  Is there a specific reference for this  Preferably something that shows minor versions too

User · Accepted Answer

These come from the class version   If you try to load something compiled for java 6 in a java 5 runtime you ll get the error  incompatible class version  got 50  expected 49   Or something like that   See here in byte offset 7 for more info   Additional info can also be found here

User · Answer

If you re having some problem about  error compiler of class file   it s possible to resolve this by changing the project s JRE to its correspondent through Eclipse    Build path Configure build path Change library to correspondent of table that friend shows last  Create  jar file  and compile and execute     I did that and it worked

User · Answer

I found a list of Java class file versions on the Wikipedia page that describes the class file format   http   en wikipedia org wiki Java class file General layout  Under byte offset 6  amp  7  the versions are listed with which Java VM they correspond to

User · Answer

If you have a class file at build com foo Hello class  you can check what java version it is compiled at using the command   javap -v build com foo Hello class   grep  major    Example usage     javap -v build classes java main org aguibert liberty Book class   grep major   major version  57   According to the table in the OP  major version 57 means the class file was compiled to JDK 13 bytecode level

[java] List of Java class file format major version numbers?

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