java - openjdk 1.7 in eclipse: operator is not allowed for source level below 1.7

Question

Eclipse gives me an error:

'<>' operator is not allowed for source level below 1.7 

I guess this is because it is not using java 1.7. Except that it is. At least openjdk 1.7 (my OS is OpenSuse 12.3).

I switched back from kepler to juno to reduce some lags and try to figure out this bug as well, to no avail so far.

Some things I have tried: - the default runtime for eclipse is opensdk 1.7 (says so in help, about, installation details) - project properties, java build -> library. I have manually added the opensdk location.

I would install the oracle version, but there is only 1.6 available from the opensuse repository. I already tried installing the rpm offered by oracle, that didn't put itself in my path and kind of messed everything up, so I removed that again.

It should work with openjdk as well no? Or do you think it has a bug?

ps: junit also was not recognised, so I manually linked to the jar file. Perhaps this is relevant information.

Answer 1

In your project's preferences, you must set the compiler --source option to 1.7 and --target option to 1.7 also. There are dedicated option boxes for that.

Right-click on the project. Choose Properties. Choose Java Compiler on the left. Choose 1.7 for the Compiler Compliance level. If the 2 drop-downs below that aren't 1.7, uncheck Use default compliance settings and set those to 1.7.