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I have a project that uses generics and a few Java 1.5/6 bits and pieces. Is it possible to compile this code to work on a system running a 1.4 JRE?
I use an ANT build script and javac task to compile the library. This builds fine while the target attribute is 1.5.
If I change the target to be 1.4 I get the following error:
generics are not supported in -source 1.4
(use -source 5 or higher to enable generics)
So I add a source attribute and try a value of 5 and 1.5. New error:
javac: source release 5 requires target release 1.5
Am I going to have to go through all my code and change the 1.5 stuff to make this work?
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If you need to compile Java to run on an older Java platforms, the simplest approach is to install a JDK for the oldest version you need to support, and use that JDK's compiler in your builds. You can also compile with a newer Java compiler, but there are complicated.
Open a command prompt window and go to the directory where you saved the java program. Assume it's C:\. Type 'javac MyFirstJavaProgram. java' and press enter to compile your code.
javac - Java programming language compiler.
-Xlint:cast This option can be used to have the compiler warn the developer that a redundant cast is being made. Here is a code snippet that would get flagged if -Xlint, -Xlint:all, or -Xlint:cast was provided to javac when compiling the source.
I've not used either of these solutions, but there is
-target jsr14 may workYou might also find javac -XD-printflat useful (though take care not to overwrite your original source).
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