Cannot create a concrete sub-class of a public abstract class, in another package

[Rushabh Shah]

While trying out some stuff for examination, came across a scenario which defeats the public keyword to a certain extent. My 2 cents, check out the following code

  package package2;

public abstract class TestingAbstractClass 
{
     abstract void implementMe();
}

package package1;

import package2.TestingAbstractClass;

public class AbstractImplementor extends TestingAbstractClass {

    public static void main(String[] args) {
        AbstractImplementor abstractImplementor = new AbstractImplementor();
        abstractImplementor. implementMe();
    }

    void implementMe() {
        System.out.println("Hi");
    }
}

Well not sure how everybody would have guessed it but for the first time i wud hv thot it prints Hi. But actually the code doesn't compile, as the abstract method is default.

[Nitish Bangera]

Yeah even though the class is visible(can extend or create instances), the member method is not visible outside the package. Also even if it was visible(public or protected), your code will not compile as you have not overridden the abstract method.

[Jesper de Jong]

Please use code tags instead of quote tags for source code.

[Rushabh Shah]

Jesper Young wrote:Please use code tags instead of quote tags for source code.

My bad. Fixed it.

[Rushabh Shah]

Nitish Bangera wrote:Yeah even though the class is visible(can extend or create instances), the member method is not visible outside the package. Also even if it was visible(public or protected), your code will not compile as you have not overridden the abstract method.

Nitish my bad, about me() method was not intended. Have rectified & put up the original code. Just that used me() for testing locally

[Nitish Bangera]

Still it won't work as you are making the overridden method access modifier more restrictive(from protected or public to default)

[Rushabh Shah]

Nitish Bangera wrote:Still it won't work as you are making the overridden method access modifier more restrictive(from protected or public to default)

not really... its default only... like the one in parent

[Nitish Bangera]

If its default, then its not visible to the class outside the package. You are creating a new method here for the subclass. I suppose this will be running fine now.