MainClass.java

/* Java OCA 考題1 */
class Super {

    int a = 10;

    public void show() {
        System.out.println("Super class");
        System.out.println("a = " + a);
    }
}

class Sub extends Super {

    int a = 50;

    @Override
    public void show() {
        System.out.println("Sub class");
        System.out.println("a = " + a);
    }
}

public class MainClass {

    public static void main(String[] args) {
        Super s1 = new Sub();
        System.out.println("s1.a = " + s1.a);
        System.out.printf("\n");
        s1.show();
    }
}