It's been long time since I've asked a question so forgive my mistakes.
So, I have a code which I don't understand. It's dealing with interface and super/sub class. I even have the answers to it but I just don't know how it got to the answer. My question is that, how would I learn tracing or is there a way I can see which lines are executed first in Eclipse?
For example, does eclipse or any other tool allows the user to actually see which and why the lines are printing?
Here is my code. I Have the correct answer to it but I just don't know how they traced it. Any help would be appreciated.
interface Silly {
public void narf();
public void poit(Silly s);
}
public class Bird implements Silly {
public static void main(String args[]) {
System.out.println("zero");
Silly s = new SillyBird(1);
Silly s2 = new Loony();
s.poit(s2);
s2.poit(s);
System.out.println("zymurgy");
}
public Bird() {
this(0);
System.out.println("zircon");
}
public Bird(int i) {
System.out.println("zanzibar");
}
public void narf() {
System.out.println("zort");
}
public void poit(Silly s) {
s.narf();
}
}
class SillyBird extends Bird {
public SillyBird() {
System.out.println("duchess");
}
public SillyBird(int i) {
super(i);
}
public void narf() {
System.out.println("drum");
super.narf();
}
}
class Loony extends SillyBird {
public Loony() {
System.out.println("stupendous");
}
public void narf() {
System.out.println("snark");
}
}
The output of the above code was:
zero
zanzibar
zanzibar
zircon
duchess
stupendous
snark
drum
zort
zymurgy
