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What output is produced by the program shown in Listing 10 ?
| Listing 10 . Listing for Question 10. |
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public class Ap129{
public static void main(String args[]){new Worker().doIt();
}//end main()}//end class Ap129
class Worker{void doIt(){
Base myVar = new A();myVar.test();
myVar = new B();myVar.test();
System.out.println("");}//end doIt()
}// end class Workerclass Base{
public void test(){System.out.print("Base ");};
}//end class Baseclass A extends Base{
public void test(){System.out.print("A ");
}//end test()}//end class A
class B extends Base{public void test(){
System.out.print("B ");}//end test()
}//end class B |
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D. A B
Another illustration of simple polymorphic behavior
In this program, two classes named A and B extend the class named Base , each overriding the method named test to produce different behavior. (Typically, overridden methods in different classes will produce different behavior, even though they have the same names.)
Behavior appropriate for object on which method is called
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