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What output is produced by the program shown in Listing 10 ?
| Listing 10 . Listing for Question 10. |
|---|
public class Ap140{
public static void main(String args[]){new Worker().doIt();
}//end main()}//end class Ap140
class Worker{void doIt(){
Base myVar1 = new Base();myVar1.test();
myVar1 = new A();myVar1.test();
myVar1 = new B();myVar1.test();
X myVar2 = (X)myVar1;myVar2.test();
System.out.println("");}//end doIt()
}// end class Workerclass Base{
public void test(){System.out.print("Base ");
}//end test()}//end class Base
class A extends Base implements X,Y{public void test(){
System.out.print("A ");}//end test()
}//end class Aclass B extends Base implements X,Y{
public void test(){System.out.print("B ");
}//end test()}//end class B
interface X{public void test();
}//end Xinterface Y{
public void test();}//end Y |
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C. Base A B B
Expansion of the program from Question 9
The class and interface definitions for the classes and interfaces named Base , A , B , X , and Y are the same as in Question 9 .
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