java “this” keyword proper use

Question

I have a Fraction class using keyword this in my constructor:

public Fraction(int numerator, int denominator)
{
    this.numerator = numerator; 
    this.         


        

Answer 1

I think you have a bit of a confusion on how the "this" keyword works.

Let me give you an example:

This

public class testing {
    private int a;
    private int b;

    testing(int a,int b){
        this.a = a;
        this.b = b;
    }
}

is the same as:

public class testing {
    private int a;
    private int b;

    testing(int x,int y){
        this.a = x;
        this.b = y;
    }
}

Which of course for the second one would be easier to put if we do it like this:

public class testing {
    private int a;
    private int b;

    testing(int x,int y){
        a = x;
        b = y;
    }
}