I have some Java code which contains some arrays. Say one of them is b. I have a string a whose value points to the names of those arrays at different times. So if a currently contains b, I want to access the 3rd element of b through a. Something which I could have done in Javascript with window[a][2]. is it possible in Java?
asked Jan 15, 2013 at 11:17
NedStarkOfWinterfell
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2 Answers
Use collections. Looks like you're looking for HashMap
Something like that:
Map<String, List<String>> map = new HashMap<String, List<String>>();
4 Comments
NedStarkOfWinterfell
So you are suggesting that the keys will be the array names, while the values will be the arrays pointed to by them?
Dmitry Zaytsev
@Cupidvogel exactly. But instead of arrays you alson can use some collection. In the end your map will look like
HashMap<String, ArrayList<T>> where T is the some type.NedStarkOfWinterfell
Yup, right. That was rather dumb of me to ask, since I already know Javascript internally uses hash to achieve this!
jlordo
Map<String, List<String>>, why not a MultiMap (e.g. in Guava)Based on your comments above, I'll give you a pseudo code answer:
Write the handler like this:
public class MyHandler implements YourHandlerInterface {
private String[] array;
public MyHandler(String[] array) {
this.array = array;
}
// your methods that have to access the array.
}
Then, when you can use them somehow like:
fileMenu.addHandler(new MyHandler(fileMenuArray));
editMenu.addHandler(new MyHandler(editMenuArray));
So you don't use dynamically generated variable names and still only have to implement it once.
Comments
dropdown, 'click`, etc. If I can't do this, I will have to write a separate handler for each, when all the handlers are exactly same save the name of the element they are dealing with..