How to Pick a Random Element from a HashSet or LinkedHashSet in Java?

Picking a Random Element from a HashSet or a LinkedHashSet in Java

When working with sets, particularly HashSets or LinkedHashSets, the need to select a random element might arise. Here's a detailed explanation of how to achieve this in Java:

The provided solution involves calculating the size of the HashSet, generating a random number within that range, and then iterating through the elements to return the one at the randomly selected index. The following code snippet demonstrates this process:

<code class="java">int size = myHashSet.size();
int item = new Random().nextInt(size); // In real life, the Random object should be rather more shared than this
int i = 0;
for (Object obj : myHashSet) {
    if (i == item) {
        return obj;
    }
    i++;
}</code>

By implementing this approach, you can efficiently select a random element from either a HashSet or a LinkedHashSet, providing a convenient solution for your programming needs.

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