Are there any Java APIs to find out the JDK version a class file is compiled for? Of course there is the javap tool to find out the major version as mentioned in here. However I want to do it programmatically so that that I could warn the user to compile it for the appropriate JDK
9 Answers
I use this script in a batch file on windows, redirect the output and grep for the major number I am verifying for:
for /R %%f in (*.class) do (
"C:\Program Files\Java\JDK8\bin\javap" -v "%%f" | findstr major )
I run it as such:
verify.bat > versionResults.txt
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