Here's a list of keywords in the Java programming language. You cannot use any of the following as identifiers in your programs. The keywords const and goto are reserved, even though they are not...
The this keyword references the object class itself. If you wanted to perform an action on the class itself, you would use this, since you can not create an instance of yourself.
This keyword is used to specify that it is a current object user normally in a constructor.ex:-this.name (which specifies the current name in an existing class)