John Patrick schrieb am 26.03.2022 16:12 (GMT +07:00): > I thought maven.compiler.release only supports Java 9 and newer (The > -release argument for the Java compiler, supported since Java9).
Small correction: The javac compiler option '--release N' exists since JDK 9, but you can also compile to older versions. A little overview, quickly compiled from what I happen to have installed locally (no 12): javac | --release ------|---------- 9 | 6-9 10 | 6-10 11 | 6-11 13 | 7-13 14 | 7-14 15 | 7-15 16 | 7-16 17 | 7-17 18 | 7-18 BTW, most people around here probably know, but for those who do not: '--release N' is **not** the same as '-source N -target N', but also ensures that code is cross-compiled not just to the byte code level N like with '-target N', but also to the exact JDK API of that version - basically a more user-friendly way to set an older JDK as boot classpath for compilation, without the need to install extra JDKs or toolchains. Each JDK 9+ contains a compressed set of legacy API descriptions utilised by '--release N'. I.e., while the compiler option really just exists since JDK 9, you can still target certain older bytecode and/or JDK API versions. And if you need really old bytecode targets in a brandnew and well-maintained compiler, you can use ECJ. Current version 3.29.0 still supports source and target versions as old as 1.3 (and of course up to 18) - a unique selling point in comparison to Javac. -- Alexander Kriegisch https://scrum-master.de --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org
