I have an array of object like
A[] a;
I also have a list of A like List<A> b = new ArrayList<A>();
I am wondering how to add a to b?
6 Answers
Just use the addAll() method with Arrays.asList() as argument:
b.addAll(Arrays.asList(a));
2 Comments
Jean Logeart
Looks like you came up with the exact same answer as mine, but you posted 2 minutes later ;-) Sadly, you got more ups out of it :p
jmg
This solution is more expensive and more complex than ABCD's solution.
Try:
b.addAll(Arrays.asList(a));
Comments
Iterate the array and add each element
for( A element : a ) {
b.add( element )
}
2 Comments
Java Drinker
+1 Sometimes keeping it simple is best. Nothing difficult here
jmg
I would advice against writing a custom loop, but for reusing an existing and easily understable generic building block (method).
Assuming you are adding the contents of a to b, you would want to use Collections.addAll(b, a);
1 Comment
jmg
This solution is better than most other here, since it removes one conversion step (array -> list)
1 Comment
John B
This will convert a from an array to a list but not add it to b.
List<A> b = new ArrayList<A>();
b.addAll(Arrays.asList(a));
atob, or do you want to add the array itself tob?