Collection to Iterable in java

Collection to Iterable in java

In Java, you can convert a Collection to an Iterable quite easily because Collection is a subinterface of Iterable. Therefore, you can directly use a Collection wherever an Iterable is expected. Here's an example:

import java.util.ArrayList; import java.util.Collection; import java.util.Iterator; import java.util.List; public class CollectionToIterableExample { public static void main(String[] args) { // Create a Collection (e.g., ArrayList) Collection<String> collection = new ArrayList<>(); collection.add("Item 1"); collection.add("Item 2"); collection.add("Item 3"); // You can use the Collection as an Iterable Iterable<String> iterable = collection; // Iterate over the elements using an Iterator Iterator<String> iterator = iterable.iterator(); while (iterator.hasNext()) { String item = iterator.next(); System.out.println(item); } } }

In this example, we start with a Collection<String> (in this case, an ArrayList). We then assign the collection to an Iterable<String> variable called iterable, which is allowed because Collection extends Iterable. Finally, we use the iterator() method to obtain an Iterator<String> from the iterable and iterate over its elements.

Since Collection already extends Iterable, you don't need to perform any explicit conversion to use a Collection as an Iterable. Just use the Collection directly wherever an Iterable is expected, and it will work seamlessly.

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