collections Archives - Page 2 of 12

Is there some one-liner bridge method to dump a given Enumeration to java.util.List or java.util.Set? Something built-in like Arrays.asList() or Collection.toArray() should exist ...

May 30, 2022
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Java, Programming

IT Nursery

Most concise way to convert a Set to a List

For example, I am currently doing this: Set<String> setOfTopicAuthors = .... List<String> list = Arrays.asList( setOfTopicAuthors.toArray( new String...

May 29, 2022
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Java, Programming

IT Nursery

Properly removing an Integer from a List

Here’s a nice pitfall I just encountered. Consider a list of integers: List<Integer> list = new ArrayList<Integer>(); list.add(5); list.add(6); list.add(7); list.add(1); Any educated ...

May 29, 2022
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C#, Programming

IT Nursery

How can I loop through a List and grab each item?

How can I loop through a List and grab each item? I want the output to look like this: Console.WriteLine("amount is {0}, and ...

May 29, 2022
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Java, Programming

IT Nursery

Which is more efficient, a for-each loop, or an iterator?

Which is the most efficient way to traverse a collection? List<Integer> a = new ArrayList<Integer>(); for (Integer integer : a) { integer.toString(); } ...

May 28, 2022
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Java, Programming

IT Nursery

How can I sort a List alphabetically?

I have a List<String> object that contains country names. How can I sort this list alphabetically? 15 Answers 15

May 28, 2022
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