Trying JIdea, followed all instruction from the gradlew readme, but on trying to run client i am getting this

"C:\Program Files\Java\jdk1.8.0_121\bin\java" -Didea.launcher.port=7533 "-Didea.launcher.bin.path=C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 2016.3.5\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_121\lib\ant-javafx.jar;C:\Program Files\Java\jdk1.8.0_121\lib\dt.jar;C:\Program Files\Java\jdk1.8.0_121\lib\javafx-mx.jar;C:\Program Files\Java\jdk1.8.0_121\lib\jconsole.jar;C:\Program Files\Java\jdk1.8.0_121\lib\packager.jar;C:\Program Files\Java\jdk1.8.0_121\lib\sa-jdi.jar;C:\Program Files\Java\jdk1.8.0_121\lib\tools.jar;C:\Users\Andre\OneDrive\Documents\Development\MinecraftForge\1.11\NPCTesting\out\production\NPCTesting;C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 2016.3.5\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain GradleStart
Exception in thread "main" java.lang.ClassNotFoundException: GradleStart
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:123)

Process finished with exit code 1

 

Ok i followed that but now in mhy run configuration for both client and server the jre is default no jre?(i have jdk installed shoul i also havce a jre installed on the computer too?)

So should i use my jdk or get

jre?

 

Where....

thank you