What is this keyword?

this keyword provides reference to the current object and it’s mostly used to make sure that object variables are used, not the local variables having same name.

classTest

{

    inta;

    intb;

    // Parameterized constructor

    Test(inta, intb)

    {

        this.a = a;

        this.b = b;

    }

    voiddisplay()

    {

        //Displaying value of variables a and b

        System.out.println("a = "+ a + "  b = "+ b);

    }

    publicstaticvoidmain(String[] args)

    {

        Test object = newTest(10, 20);

        object.display();

    }

}