EclipseJdt

plugins {
    id 'java'
    id 'eclipse'
}

eclipse {
  jdt {
    //if you want to alter the java versions (by default they are configured with gradle java plugin settings):
    sourceCompatibility = 1.6
    targetCompatibility = 1.5
    javaRuntimeName = "J2SE-1.5"

    file {
      //whenMerged closure is the highest voodoo
      //and probably should be used only to solve tricky edge cases.
      //the type passed to the closure is Jdt

      //closure executed after jdt file content is loaded from existing file
      //and after gradle build information is merged
      whenMerged { jdt
        //you can tinker with the Jdt here
      }

      //withProperties allows addition of properties not currently
      //modeled by Gradle
      withProperties { properties ->
          //you can tinker with the java.util.Properties here
      }
    }
  }
}