[HELP] java.lang.UnsupportedClassVersionError

https://forums.bukkit.org/threads/help-java-lang-unsupportedclassversionerror.73077/

its exactly the same error as that but I don't know how to compile in java 6 using eclipse....

 

Hello Themuddfamily,

1. Change your Buildpath
   1. Right Click your Project
   2. Properties
   3. Java Build Path
   4. Libraries
   5. Remove JRE System Library [JavaSE-1.*]
   6. Add Library...
   7. JRE System Library >> Next
   8. Tick "Execution environment".
   9. Select "JavaSE-1.6"
   10. Finish
2. Change Compiler:
   1. Right Click your Project
   2. Proberties
   3. Java Compiler
   4. Tick "Enable Project specific settings"
   5. Tick "Use compliance form execution..."
3. Click Apply
4. Click OK

 

First, go to your plugin's properties:

Then, select "build path":

Next, go to "Add library":

"JRE System Library":

Click "Alternate JRE", followed by "Installed JREs"

In the popup that follows, click "Add"

Then "Standard VM", followed by "Next":

Add the relevant directory for your JDK1.6 install, and "Finish":

Select the old JRE system library for 1.7:

And click "Remove":

There we are, you should now be building against JDK6.