在IntelliJ for OSX中设置Java语言级别

Question

Have a Java project, which is setup to build a .jar file. Java 1.7 is installed, and have set the project to Language Level 6.
However, it keeps compiling the jar files (via the artifact builder) to Java 1.7, so I get the following error when trying to run on a Java 1.6 JVM:

Exception in thread "main" java.lang.UnsupportedClassVersionError: com/mycompany/myproject/MyClass : Unsupported major.minor version 51.0

• Under File -> Other Settings -> Default Settigns... -> Compiler , I've set "Project bytecode version" to 1.6,

• Also tried setting "Additional command line parameters" to -target 1.6 and -source 1.6

• Have also added this line to ~/.bash_profile (so that java -version returns 1.6.0_65 ) and restarting IntelliJ:

  export JAVA_HOME= /usr/libexec/java_home -v '1.6*'

But IntelliJ still keeps building the jar to Java 7, and it fails to run on JVM 1.6. What might I try next?

What is Project Language level in IntelliJ IDEA?

Answer 1

You need to change the "Project bytecode version" setting under IntelliJ IDEA | Preferences | Compiler and not under File | Other Settings | Default Settings | Compiler.