What is "this" in Java

The "this" keyword can be used inside methods and constructors.

It returns the reference to the current object.

For example:


Here the setValue tries to set the value of the argument to the class variable n. Since the name n is already used in the method's parameter name, so n=n is absurd. The workaround is to use the “this” keyword to refer to the object. That's why we used “this.n=n”.

Another example of using “this” is when you need to pass your current object to another method.

Example:

In the above example, B has a member variable n. The method setMe calls another class method and passing itself as a object.