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Regarding type casting

Vijay Chandran
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Joined: Jan 07, 2007
Posts: 178
Dear friends,

Please help me in this type casting problem:

I am using JDK 1.4.
I want to convert a long(primitive data type) type cast it and assign it to a Long(Wrapper class) variable.

Kindly provide your help regarding this pronlem.
Thanks in advance.

Regards,
Vijay
Freddy Wong
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Joined: Sep 11, 2006
Posts: 959

Use Long.valueOf(long)


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Vijay Chandran
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Joined: Jan 07, 2007
Posts: 178
Thanks a lot Freddy
Peter Chase
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Joined: Oct 30, 2001
Posts: 1970
Note that this is not type-casting. You are constructing a new object.

Type casting is for object references or primitives.

For object references, you type cast when you have declared a reference as a superclass, but you know that the object it points to is actually of some subclass.

For primitives, you type cast when you want to force the primitive value into a variable whose type is not automatically compatible. For instance, you can assign an int value to a long, with no cast. But if you want to assign a long to an int, you need to cast. If the long does not fit in the int, information will be lost.


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