Importance of the this keyword

There is one more keyword in Java that is just like the super keyword: this. In this section, we will take a look at the this keyword.

Let's explain the this keyword with an example. Create a class named thisDemo and declare a variable, a, and assign the value 2 to it. We define a getData() method in its class, declare the a variable inside it, and assign the value 3 to it. We also add a print statement in it. The code will look as follows:

package coreJava;public class thisDemo
{
    int a= 2;
    public void getData()
    {
        int a= 3;
        System.out.println(a);
    }

As we can see, the value of a is 2 in the entire class, but in one specific method, getData(), we want the value of the variable to be 3. In this code, we want to call both values of a, that is, 2 and 3. We create an object in the main method and add the td object in it. The code for the td object is as follows:

thisDemo td=new thisDemo();
td.getData();

If we run the code, the output we...