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How to return multiple objects from a Java method?
Is there any way to return multiple defferent objects from a Java method
for example i want return string ,int ,object ,.. etc
thanks
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@BeauGrantham i want to return different objectsAAlkhabbaz– AAlkhabbaz2011-12-20 22:56:11 +00:00Commented Dec 20, 2011 at 22:56
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3 Answers
You can return a Map<Class, Object> containing the resulting objects' types mapped with their values.
public Map<Class, Object> doSomeStuff(){
Map<Class, Object> map = HashMap<Class, Object>();
map.put(String.getClass(), "This is an example");
map.put(Object.getClass(), new Object());
//...
return map;
}
// You can then retrieve all results by
String stringVal = map.get(String.getClass());
Object objectVal = map.get(Object.getClass());
2 Comments
Dr.jacky
Which one of these solution is better? your's or this: stackoverflow.com/questions/457629/…
GETah
They are the same. Notice the most voted answer on the one you linked to here states that using a map is better - that's what my answer here explains :)
Make a new class and return that class.
//Give this a more descriptive name reflecting what it REALLY is.
public static class ReturnData{
protected String foo
protected int bar
public ReturnData(String foo, int Bar) {
...
}
String getFoo() {
...
}
int getBar() {
...
}
Then in your method instantiate the object with what you want to return
MyMethod(...){
...
...
return new ReturnData(foo, bar);
}
Viola! You returned both foo and bar at same time.
Comments
Not explicitly. You can make your own class that contains eveything, and return that, or you can return some form of Object array (Object[]) or list (like an ArrayList) that contains everything, but that is not recommended.
EDIT: Also you can use generics as mentioned above, this falls under the category of making your own class, thought I would mention it seperately too though.
