javac
https://docs.oracle.com/en/java/javase/11/tools/javac.html#GUID-AEEC9F07-CB49-4E96-8BC7-BCC2C7F725C9
-source -target
-source release
Specifies the version of source code accepted. The following values for release are allowed:
Beginning with JDK 9, javac no longer supports -source release settings less than or equal to 5. If settings less than or equal to 5 are used, then the javac command behaves as if -source 6 were specified.
1.6
No language changes were introduced in Java SE 6. However, encoding errors in source files are now reported as errors instead of warnings as was done in earlier releases of Java Platform, Standard Edition.
6
Synonym for 1.6.
1.7
The compiler accepts code with features introduced in Java SE 7.
7
Synonym for 1.7.
1.8
The compiler accepts code with features introduced in Java SE 8.
8
Synonym for 1.8.
9
The compiler accepts code with features introduced in Java SE 9.
10
The compiler accepts code with features introduced in Java SE 10.
11
The default value. The compiler accepts code with features introduced in Java SE 11.
-target release
Generates class files for a specific VM version.
–release
–release release
Compiles against the public, supported and documented API for a specific VM version. Supported release targets are 6, 7, 8, 9, 10, and 11.
Java
refer to : https://docs.oracle.com/en/java/javase/11/tools/java.html#GUID-3B1CE181-CD30-4178-9602-230B800D4FAE