Then I unzipped Eclipse Mars into a brand new directory, created a new project, and now I can select 1.8, hurrah! That greatly reduced the "Duplicate methods named spliterator." errors I was getting when compiling my code under Java 1.8, however, there is still one left:ĭuplicate default methods named spliterator with the parameters () and () are inherited from the types List and Set. When I clicked on that, it shows "jdk1.8.0" as a compatible JRE, so I selected that, but still no change. I also couldn't see a 1.8 in the Execution Environments underneath Installed JREs, only a JavaSE-1.7 (which I haven't even got installed!). Java -version on command line reports 1.8Įclipse only let me choose a compiler compliance level op to 1.7 in the compiler preferences, even though my installed JRE is 1.8.0. I had the same problem even though I had: I think you should use kepler SR2 with support plugin, or change to Eclipse Luna. It cause eclipse kepler SR1 does not support new Java™ 8 language enhancements like lambda expression. For example, if version -java returns Java 1.8.
You can download your platform's JDK 8 here If you are not compiling MATLAB code or developing Java applications, you can install the Java Runtime. If you want to specify an additional JDK, you can add a new Java System Library by going to: Project -> Properties -> Java Build Path -> Libraries -> Add Library -> Java System LibraryĪnd navigating to a valid location for the JDK 8. Once you get Luna, your JAVA_HOME variable should be enough to get Eclipse to recognize JDK 8. I'd try with Luna and the above suggestions before you go any further. You will need to have Eclipse Luna in order to get support for Java 8, but you can add it to Kepler SR2 if you want. This will treat all your code as if it's using Java 1.7. Second, in your screenshot above, your compiler compliance level is set to 1.7. If you do have the JDK, you need to configure eclipse to point to that in your settings.
If you have a Maven project, Right-Click on your Project > Maven > Update Project Once you have changed the Installed JRE entry to JDK, click on Apply and Close.
functional interfaces) to a lambda expression: As well as ones for converting back, or even changing the body expression to a block (ctrl+1): And in-line refactoring. There are quick-fixes, for converting anonymous inner classes (with a single method i.e. Now select the entry, click on Edit and then change the path from JRE to JDK. The Eclipse Java Compiler (EJC) now supports Java 8 and the tools are well integrated. But because you are seeing this error, you will find an entry for JRE instead, similar to the snapshot below. You should have an entry with a JDK there. Go to Window > Preferences > Java > Installed JREs > and check your installed JREs. This solution assumes that you are using Eclipse IDE for development.
To fix this issue you will have to update your IDE preferences. This error doesn't mean that your project has some problem but it is just because some wrong Java related configuration in your IDE which you must correct to successfully run your project. Perhaps you are running on a JRE rather than a JDK? No compiler is provided in this environment. If you have downloaded Eclipse or STS IDE for Spring projects, it's possible that while compiling/building/running your Java project you may get the following error with BUILD FAILURE message in the console.