Java 1.7 is not visible in eclipse preforences ?

To add Java 1.7 manually in preforences , we have to goto workspace
C:\Workspace\.metadata\.plugins\org.eclipse.core.runtime\.settings
and edit file org.eclipse.jdt.core.prefs and change below

org.eclipse.jdt.core.compiler.compliance=1.7
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
org.eclipse.jdt.core.compiler.source=1.7


And restart eclipse , then it will set Java compiler as 1.7