Generic Classes

Question

Place code into the class so that it compiles & generates the out put answer=42

Note:Code options may be used more than once.

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This question is from SCJP , I have posted answer. I can't understand why they used

public Gen (T object){this.object = object}

instread of

public T ( T object){this.object = object}

i am getting confused in this. Please help me out

Why should have they used `T(T object)`? That's a constructor. And name of the class is `Gen`. — Rohit Jain, Mar 12 '14 at 15:37
Well, this is supposed to return a `Gen` object that takes a parameter of type `T`. To get the object, call `T getObject()` method. — Hungry Blue Dev, Mar 12 '14 at 15:38

score 0 · Answer 1 · answered Mar 12 '14 at 15:38

0

public Gen (T object){this.object = object} is the constructor.

The constructor MUST have the exact same name as the class

answered Mar 12 '14 at 15:38

geoand

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score 0 · Answer 2 · answered Mar 12 '14 at 15:38

0

Because gen is the class name here, where T is the generic. So Its class Gen with object type T. If you said class T then T would be the class name and not the object type.

answered Mar 12 '14 at 15:38

javawocky

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score 0 · Answer 3 · answered Mar 12 '14 at 15:41

0

Because public Gen (T object){this.object = object} is the constructor of the class Gen

answered Mar 12 '14 at 15:41

TheEwook

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score 0 · Answer 4 · answered Mar 12 '14 at 15:43

0

In the constructor signature, the constructor name, must match the class name. Also, why T would represent Gen type?. The whole idea is getting compile type safety when using statements like Gen<String>, Gen<Integer>...

answered Mar 12 '14 at 15:43

Daniel Conde Marin

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Generic Classes

4 Answers4