I am trying to run JUnit test with a 1.5 JRE, but get the error Message:
java.lang.UnsupportedClassVersionError: Bad version number in .class file
When I switch to JRE 1.6 (actually a JDK but that shouldn't matter, right?) everythings works fine.
So the questions are:
JUnit 5 requires Java 8 (or higher) at runtime.
JUNIT4 doesn't work under java 8.
The platform changes in a highly incompatible way and the Vintage engine will no longer be supported. This is not to be expected in the near future.
A spot check of a few classes shows that the JUnit 4.8.2
jar file was compiled with java 5, or with the java 6 compiler with the -target
option set so that it makes java5-compatible class files.
A far more likelier explanation is that you've accidentally compiled the test you wanted to run with a Java 6 JDK. What does:
javap -verbose -classpath YOUR_TOP_DIRECTORY com.yourname.YourTest
say at the top of its output for "major version"? If it says 50
, then the problem is that you've compiled your test class for java 6 only. You need to either use a JDK 5 compiler or pass the option -target 1.5
to your compiler.
The current .jar file for JUnit 4.8.2 was compiled with/for Java 5 (class version number is 49.0).
I remember an earlier version accidentally being built with Java 6 (and without the -target switch), but that was simply a mistake.
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