The expression of type long is boxed into Long

Question

I am having a method

public double getNumberOfBooks(final int count, final double Price,
        final Long Quantity, final double totalValue)

Now I am calling this method from other java class as mentioned below

public void testgetNumberOfBooks()
{
    Long obj = Long.valueOf(5l);
    long val1 = obj.longValue();

    //long val = 100L;

    final double percentageDiscountComp = 
         testClass.getNumberOfBooks(10, 900.00d, val1, 1000.00d);

}

But not able to pass the value of Long in argument.It's giving error as The expression of type long is boxed into Long.

I am not getting this error in my IDE, maybe its just a warning message. Perhaps it is better to pass just the obj in the arguments why at all unbox it ? — Sikorski, Feb 28 '17 at 07:15
It isn't an error. It is a warning, and you can ignore it / turn it off. However, there is a point to it. Namely you appear to have declare a parameter as `Long` that possibly ought to be `long`. Unless there is a good reason to use `Long`, then that is inefficient. — Stephen C, Feb 28 '17 at 07:21

score 0 · Answer 1 · edited May 23 '17 at 12:31

0

No errors in intellij-idea. It might me settings of your Eclipse. Found similar error message in this question: The expression of type x is boxed into X?

edited May 23 '17 at 12:31

Community

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answered Feb 28 '17 at 07:14

Dmitry Gorkovets

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There's no error or warning in Eclipse either (Mars 2) – david a. Feb 28 '17 at 07:21
So maybe is depends on default settings of different Eclipse versions. – Dmitry Gorkovets Feb 28 '17 at 07:26

The expression of type long is boxed into Long

1 Answers1