Question

This is for a Fraction program. I have private ints num and den, Fraction, and FractionInterface – the standard homework problem. I have done pretty much everything and now have been stuck for a few hours on the equals method. Since other is an Object, I can’t equate it to Fraction. Here’s what I have:

public boolean equals(Object other){        
     if (other == this){
         return true;
     } else {
         return false;
     }
}

This compiles but it gives incorrect results:

1/2 eq 1/2 = true
1/2 eq 1/2 = true
1/2 eq 1/2 = false
1/2 eq 1/2 = false

If I try other == Fraction, it doesn’t compile. Thanks for any help!

Answer 1

Try this out:

First, cast the other object

Fraction otherFraction = (Fraction) other;

Then, determine the condition that the two fractions are equivalent.
This will include some logic involving the comparing of numerator and denominators (expect to use getNum() and getDen() for the otherFraction.