Why to @Override ???

In Java, your classes automatically inherit a toString() method which attempts to print out a text representation corresponding to the object you have. However, not all the time does the output make sense. In many cases you might get something that looks like this:

test.myObject@18e2b22

The output is a unique hash code that corresponds to your object. Not very useful or descriptive, but this is the default toString() implementation. To make the information more useful you can Override the default implementation and use your own.

@Override
public String toString() {
    return String.format (Song %s by %s2", mTitle, mArtist);
}

The code above tells Java that first, we are overriding the toString() method in our class. Second, we then come up with a string output that is more descriptive than displaying a simple hash code. Our new toString() method makes it very easy to represent our current object as a string of text. Try renaming the toString() method to see how the default format looks.