Modifiers

[suresh Muthu]

Replace two of the Modifiers that appear in the Single class to make the code compile. NOTE: Three Modifiers will not be used and four modifiers will remain unchanged.

code:

public class Single{

private static single instance; // Change the Modifier (private,static)

public static Single getInstance(){ // Change the Modifier(public,static)

if(instance == null) instance = create();

return instance;

}

private Single(){} //Change the Modifier

protected Single create() { return new Single(); } //Change the Modifier

}

class SingleSub extends Single{ }


Modifiers :

1. final
2. protected
3. private
4. abstract
5. static

[Jesper de Jong]

Suresh, when you copy a question from a book or mock exam, we require that you quote your sources. So, please tell us where you copied it from.

As with your previous question: Just try it out for yourself to see what compiles and what doesn't.
[ August 18, 2008: Message edited by: Jesper Young ]

[Ankit Garg]

the create method will have to be made static as static getInstance method access it directly...

the constructor will have to be made protected as the SingleSub class inherits from it and the constructor is private...