How to open associated doc while the source file is open?

Lets say I am in the String class inside of intellijIDEA. Since I want to study about the String class, I want to go to String Java doc with one keyboard shortcut.

For example, I want my browser my browser to go https://docs.oracle.com/javase/7/docs/api/java/lang/String.html with a keyboard shortcut key when String.java class in open inside of IntellijIDEA.

Is there any intellijIDEA keyboard shortcut key that does it?