How to Convert a Primitive Long Array to a List of Longs in Java?

Converting Primitive Long Arrays to List of Longs

Converting an array of primitive longs (long[]) to a List can be a straightforward yet puzzling task for Java programmers. The conventional approach of utilizing Arrays.asList() may not suffice, prompting the need for alternative solutions.

In this article, we explore a reliable approach to accomplish this conversion using Java 8 features:

Using Streams

With Java 8's stream functionality, converting primitive long arrays to List becomes a concise and efficient operation:

<code class="java">long[] arr = { 1, 2, 3, 4 };
List<Long> list = Arrays.stream(arr).boxed().collect(Collectors.toList());</code>

Here's how this solution works:

• Arrays.stream(arr) creates a stream from the primitive long array.
• boxed() converts the primitive long values in the stream to objects of type Long.
• Collectors.toList() collects the elements in the stream into a list.

By utilizing this approach, you can effectively transform an array of primitive longs into a List without facing compile-time errors or runtime exceptions.

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