AOM_Sample.java

package ex;
class AOM_Super {
    public void test1() {
        test2();
        System.out.println("test");
    }

    private void test2() {
        System.out.println("test");
    }
}

public abstract class AOM_Sample extends AOM_Super {
    @Override
    public abstract void test1();

    public abstract void test2();
}