Generics - How can i put this code into Generics

Question

How can i put this code into Generic form ?

List aviary = new ArrayList();
Eagle any Eagle;
aviary.add(new Eagle(100, "Brutus"));
aviary.add(new Eagle(100, "Chronos"));
for (int i=0; i<aviary.size(); i++) {
anyEagle = (Eagle) aviary.get(i);
anyEagle.hunt();
}

It's all explained here: http://docs.oracle.com/javase/tutorial/java/generics/ — Alexis C., May 04 '14 at 13:14
Did you try `List` ? Some IDEs will help you use generics, and even format your code. ;) — Peter Lawrey, May 04 '14 at 13:14
BTW Javascript has nothing to do with Java so I'm removing it from the tags. — Peter Lawrey, May 04 '14 at 13:16

score 1 · Answer 1 · answered May 04 '14 at 13:18

1

You can use generics and the for-each loop like this in Java 7

List<Eagle> aviary = new ArrayList<>();
aviary.add(new Eagle(100, "Brutus"));
aviary.add(new Eagle(100, "Chronos"));

for (Eagle eagle: aviary)
    eagle.hunt();

answered May 04 '14 at 13:18

Peter Lawrey

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score 0 · Answer 2 · answered May 04 '14 at 13:16

0

First line needs to be changed to

List<Eagle> aviary = new ArrayList<>();

I assume Eagle is a valid object that you have. If you change the line above, you can get rid of the typecasting in this line

anyEagle = (Eagle) aviary.get(i);

answered May 04 '14 at 13:16

Hirak

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Generics - How can i put this code into Generics

2 Answers2