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Re: int Data Type, Primitive or Not?
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#1
 
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Re: int Data Type, Primitive or Not? -
08-25-2004
, 01:36 PM
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The reason I ask is because I need a way to pass an integer to Microsoft.Office.Interop.Excel.SeriesCollection.It em(Object) In C#, int is aliased to System.Int32 so doing something like SeriesCollection.Item(1) works fine. However, in J# this will not even compile, and doing something like SeriesCollection.Item(new Integer("1")) throws a "Item method of SeriesCollection class failed" exception for me. Thanks, Nate |
distinguishes the two as follows:
int is a primitive type and is not directly assignable to Object (so that J#
does not break the Java specs)
System.Int32 is the .NET boxed version of int, and it is directly assignable
to Object (here, we don't care about the Java specs because System.Int32
does not belong to the Java world).
Also, System.Int32 and java.lang.Integer are different classes. The first
one gives you .NET boxing (and works with .NET reflection for example), the
second one gives you Java boxing (and works with java.lang.reflect classes).
So, you have two ways to box an int in J#:
(System.Int32)i gives you .NET boxing
new Integer(i) gives you Java boxing
For you Excel interop problem, you should try
SeriesCollection.Item((System.Int32)1).
Bruno.
#2
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For you Excel interop problem, you should try SeriesCollection.Item((System.Int32)1). I did a small test, yes Bruno this will work. =  )Cheers, Lars-Inge |
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