since javac support -target option, does it mean that I can use any new feature of a latest jdk, and make it work on an older JRE version?
For example if I use jdk 8's new featres and use -target 1.5, will the program work fine in JRE 1.5?
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Of course it won't. – user207421 Nov 28 '16 at 05:56
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1See here: http://stackoverflow.com/questions/22610400/a-program-made-with-java-8-can-be-run-on-java-7 – Tim Biegeleisen Nov 28 '16 at 05:56
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Java 5 code should, in theory, be runnable on a Java 8 JRE, but not vice-versa. _Backwards_ compatibility is supported, but not necessarily _forwards_. – Tim Biegeleisen Nov 28 '16 at 05:56