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What happens when the following program is compiled and run?public abstract class MyAbstract { abstract int getSum();abstract int getSum(int x);abstract int getSum(int x, int y);} public abstract class Sub extends MyAbstract { int x = 4; int getSum(){return x + x;}int getSum(int x){return x + x;}int getSum(int x, int y){int z = x + y;System.out.print(z);return z;}public static void main(String[] args){Sub sub = new Sub();sub.getSum(4,2);}}

Question

What happens when the following program is compiled and run?public abstract class MyAbstract { abstract int getSum();abstract int getSum(int x);abstract int getSum(int x, int y);} public abstract class Sub extends MyAbstract { int x = 4; int getSum(){return x + x;}int getSum(int x){return x + x;}int getSum(int x, int y){int z = x + y;System.out.print(z);return z;}public static void main(String[] args){Sub sub = new Sub();sub.getSum(4,2);}}

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Solution

The code you provided will not compile. The reason is that you have declared the class Sub as abstract but you are trying to create an instance of it in the main method. Abstract classes in Java cannot be instantiated. They are meant to be extended by other classes.

If you want to run this code, you need to remove the abstract keyword from the Sub class declaration. However, even after doing that, you will still encounter a problem because the Sub class is extending an abstract class MyAbstract but it's not providing the implementation for all the abstract methods declared in MyAbstract.

In your Sub class, you need to provide the implementation for all the abstract methods declared in MyAbstract class.

Here is the corrected code:

public abstract class MyAbstract {
    abstract int getSum();
    abstract int getSum(int x);
    abstract int getSum(int x, int y);
}

public class Sub extends MyAbstract {
    int x = 4;
    int getSum() {
        return x + x;
    }
    int getSum(int x) {
        return x + x;
    }
    int getSum(int x, int y) {
        int z = x + y;
        System.out.print(z);
        return z;
    }
    public static void main(String[] args) {
        Sub sub = new Sub();
        sub.getSum(4,2);
    }
}

When you run this program, it will print 6 to the console because it's the sum of 4 and 2 which are the arguments passed to the getSum(int x, int y) method.

This problem has been solved

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