Define the missing method. use "this" to distinguish the local member from the parameter name.

In this article we will see why we get the message "Define the missing method. Use "this" to distinguish the local member from the parameter name".

I started learning java a few days back. Now I am working on the object-oriented part, and learning the Object and Instance. I figure out the (this.) term in java. What does “this” mean in java? What does it do? Moreover, there are two types of ‘’’THIS’ here I can see. One is “this” and the other one is “this.”

Solution

‘this’ is a reference variable in java that refers to the current object of the main method. Let’s make it clear with an example below:

 class MyClass 
        { 
            int x; 
            int y; 
            
            MyClass(int x, int y) 
            { 
                this.x = x; 
                this.y = y; 
            } 
        
            void display() 
            { 
                System.out.println("X = " + x + "  Y = " + y); 
            } 
        
            public static void main(String[] args) 
            { 
                MyClass object = new MyClass(5, 10); 
                object.display(); 
            } 
        }

As you can see above we have an instance variable X and Y under MyClass. We also have a constructor that is parameterized by the variable X and Y. The (this.) keyword refers to the values of the two instance variables inside our constructor

After that, we used our constructor by creating a new object ‘object’ inside the main function which leads us through getting the output

Conclusion

So we discussed with an example how to get around the issue of defining the missing method. Use "this" to distinguish the local member from the parameter name. I hope it helped. Happy coding and happy exploring.