Is this sentenced to call constructor?

Question

public class TestBikes {
public static void main(String[] args){
Bicycle bike01, bike02, bike03;

bike01 = new Bicycle(20, 10, 1);
bike02 = new MountainBike(20, 10, 5, "Dual");
bike03 = new RoadBike(40, 20, 8, 23);

bike01.printDescription();
bike02.printDescription();
bike03.printDescription();
}
}

can line 3 (Bicycle bike01, bike02, bike03) and its 3 instance be rewritten as

Bicycle bike01 = new Bicycle(20, 10, 1);
Bicycle bike02 = new MountainBike(20, 10, 5, "Dual");
Bicycle bike03 = new RoadBike(40, 20, 8, 23);

Why don't you try it ? (and please fix the tags to include `java`) — Nir Alfasi, Dec 28 '13 at 09:04
If the two extends Bicycle and they have appropriate constructor, then I don't see why not — Paul Samsotha, Dec 28 '13 at 09:05
i cant, only have part of the code. the other clases are not availablel. — Leonne, Dec 28 '13 at 09:07

score 2 · Answer 1 · answered Dec 28 '13 at 09:05

2

You seem to be asking whether you can initialize a variable as part of its declaration, e.g.:

Bicycle bike01 = new Bicycle(20, 10, 1);

rather than

Bicycle bike01;

bike01 = new Bicycle(20, 10, 1);

Yes, you can do that, and people commonly do. It doesn't change the resulting program.

Side note: When you find yourself writing variable names like bike01, bike02, etc., consider using an array or similar instead.

answered Dec 28 '13 at 09:05

T.J. Crowder

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oh now i get it... thanks for help :) – Leonne Dec 28 '13 at 09:11

score 0 · Answer 2 · answered Dec 28 '13 at 09:07

0

Yes of course , In the first case you just define them at the first then you initialize them but in the second case you define and initialize them simultaneously

answered Dec 28 '13 at 09:07

Tareq Salah

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Is this sentenced to call constructor?

2 Answers2