Top "Boxing" questions

How to convert int[] into List<Integer> in Java?

How do I convert int[] into List<Integer> in Java? Of course, I'm interested in any other answer …

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Why do we need boxing and unboxing in C#?

Why do we need boxing and unboxing in C#? I know what boxing and unboxing is, but I can't comprehend …

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Convert an array of primitive longs into a List of Longs

This may be a bit of an easy, headdesk sort of question, but my first attempt surprisingly completely failed to …

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How to convert byte[] to Byte[] and the other way around?

How to convert byte[] to Byte[] and also Byte[] to byte[], in the case of not using any 3rd party …

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What is boxing and unboxing and what are the trade offs?

I'm looking for a clear, concise and accurate answer. Ideally as the actual answer, although links to good explanations welcome.

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What is the difference between boxing/unboxing and type casting?

What is the difference between boxing/unboxing and type casting? Often, the terms seem to be used interchangeably.

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Why comparing Integer with int can throw NullPointerException in Java?

It was very confusing to me to observe this situation: Integer i = null; String str = null; if (i == null) { //Nothing …

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Does int.class equal Integer.class or Integer.TYPE in Java?

Let's imagine one retrieves the declaring type of a Field using reflection. Which of the following tests will correctly indicate …

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In Java 8, is there a ByteStream class?

Java 8 provides Stream<T> specializations for double, int and long: DoubleStream, IntStream and LongStream respectively. However, I could …

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Findbugs issue with "Boxing/unboxing to parse a primitive" with Integer.valueOf(String)

I have this piece of code: public void someMethod(String id) { someOtherMethod(Integer.valueOf(id)); } public void someOtherMethod(int id) { // …

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