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scjp question from the 2nd chapter

nikunj thakur
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Joined: Sep 23, 2007
Posts: 47
1. class Plant {
2. String getName() { return "plant"; }
3. Plant getType() { return this; }
4. }
5. class Flower extends Plant {
6. // insert code here
7. }
8. class Tulip extends Flower {}

Which statement(s), inserted at line 6, will compile? (Choose all that apply.)

Flower getType() { return this; }

String getType() { return "this"; }

Plant getType() { return this; }

Tulip getType() { return new Tulip() ;}


In the above example the answers are 1st,3rd & 4th line, but in the 4th line return why can't i write return this instead new Tulip().
Ganesha Kumar
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Joined: May 04, 2006
Posts: 56
Hi
You can't return 'this' because, the return type should be a Tulip object. But Flower is not a Tulip.
 
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subject: scjp question from the 2nd chapter