i just put java jdk 8 in my eviroment variable JAVA_HOME but then this is what happend
C:\GitHub\ImmersiveEngineering-1.10 [master +10 ~0 -0 !]> .\gradlew build
#################################################
ForgeGradle 2.2-SNAPSHOT-0447b4e
https://github.com/MinecraftForge/ForgeGradle
#################################################
Powered by MCP unknown
http://modcoderpack.com
by: Searge, ProfMobius, Fesh0r,
R4wk, ZeuX, IngisKahn, bspkrs
#################################################
Found AccessTransformer: ImmersiveEngineering_at.cfg
:extractMcpMappings SKIPPED
:deobfCompileDeobfDepTask0 SKIPPED
:deobfCompileDeobfDepTask1 SKIPPED
:deobfCompileDeobfDepTask2 SKIPPED
:deobfCompileDeobfDepTask3 SKIPPED
:deobfCompileDeobfDepTask4 SKIPPED
:deobfCompileRemapDepSourcesTask5 SKIPPED
:deobfCompileRemapDepSourcesTask6 SKIPPED
:deobfCompileRemapDepSourcesTask7 SKIPPED
:deobfCompileRemapDepSourcesTask8 SKIPPED
:deobfCompileRemapDepSourcesTask9 SKIPPED
:deobfCompileDummyTask
:deobfProvidedDummyTask
:sourceApiJava UP-TO-DATE
:compileApiJava UP-TO-DATE
:processApiResources UP-TO-DATE
:apiClasses UP-TO-DATE
:sourceMainJava UP-TO-DATE
:compileJava FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileJava'.
> Could not find tools.jar
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 22.926 secs