Question

In my Java book there is an exercise that ask you to : “Allocate 10000 Rational objects without saving them in variables to they become garbage.”

Is below the correct way to allocate objects without assigning them to varaibles?

    for (int i = 0; i < 10000; i++) {
        new Rational();
    }

Thanks

Answer 1

That’s correct, each Rational is instantiated without a reference and therefore are subsequently garbage collected at some point. Java doesn’t have a way to force garbage collection, but you can call Runtime.gc() to request a garbage collection.