Java to C# conversion - int uint types

Question

I'm converting code from java to c# and got stuck with int and uint. Java code (excerpt):

public static final int SCALE_PROTO4_TBL    = 15;
public static final int [] sbc_proto_4 = { 0xec1f5e60 >> SCALE_PROTO4_TBL };

Converted c# code (excerpt):

public const int SCALE_PROTO4_TBL = 15;
int[] sbc_proto_4 = new int[] { 0xec1f5e60 >> SCALE_PROTO4_TBL };

That results in the following compile error: Error CS0266 Cannot implicitly convert type 'uint' to 'int'. An explicit conversion exists (are you missing a cast?)

There exist lots of code like the above but I'm not sure if I should convert all the Java int's to C# uint's ? As I recall C# uint doesn't store negative values to if the java int is a negative number then I got a problem.

Any input on how I should approach the problem ?

you need to explicitly cast uint to int. But considering that may lead to a data loss. — Jean
– Jean, Commented Nov 12, 2015 at 9:38

Rahul Tripathi · Accepted Answer · 2015-11-12 09:45:42Z

1

You can try like this:

int[] sbc_proto_4 = new int[] { unchecked((int)0xec1f5e60) >> SCALE_PROTO4_TBL };

ie, you have to cast the uint(0xec1f5e60) explicitly.

edited Nov 12, 2015 at 9:45

answered Nov 12, 2015 at 9:37

Rahul Tripathi

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9 Comments

user1005448 Over a year ago

I'm aware of the unchecked keyword but I can't use that. E.g. if you print out the value of 0xec1f5e60 you'll see 3961478752. If you convert it using the unchecked keyword then the value will be -333488544

user1005448 Over a year ago

Guess I should just a long instead of an int

Rahul Tripathi Over a year ago

@user1005448:- The point is you need to do an explicit cast of your uint value. I am not sure which value you want to use in your context. Hope you can now understand the error reason and how to resolve it

user1005448 Over a year ago

Can't use long as datatype since >> specifies that the second must be of type int

user1005448 Over a year ago

I tried to look at the hex value which is the same so I'm gonna accept your answer to use unchecked. Thanks for your time.

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