CODEWITHSUNDEEP
javaliteralsprimitive-types
Mubashar
Mubashar

Reputation: 12658

Setting Short Value Java

I am writing a little code in J2ME. I have a class with a method setTableId(Short tableId). Now when I try to write setTableId(100) it gives compile time error. How can I set the short value without declaring another short variable?

When setting Long value I can use setLongValue(100L) and it works. So, what does L mean here and what's the character for Short value?

Thanks

Upvotes: 166

Views: 193872

Answers (4)

Lauri
Lauri

Reputation: 4800

In Java, integer literals are of type int by default. For some other types, you may suffix the literal with a case-insensitive letter like L, D, F to specify a long, double, or float, respectively. Note it is common practice to use uppercase letters for better readability.

The Java Language Specification does not provide the same syntactic sugar for byte or short types. Instead, you may declare it as such using explicit casting:

byte foo = (byte)0;
short bar = (short)0;

In your setLongValue(100L) method call, you don't have to necessarily include the L suffix because in this case the int literal is automatically widened to a long. This is called widening primitive conversion in the Java Language Specification.

Upvotes: 248

matt burns
matt burns

Reputation: 25390

Generally you can just cast the variable to become a short.

You can also get problems like this that can be confusing. This is because the + operator promotes them to an int

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Casting the elements won't help:

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You need to cast the expression:

enter image description here

Upvotes: 30

L. Cornelius Dol
L. Cornelius Dol

Reputation: 64036

You can use setTableId((short)100). I think this was changed in Java 5 so that numeric literals assigned to byte or short and within range for the target are automatically assumed to be the target type. That latest J2ME JVMs are derived from Java 4 though.

Upvotes: 11

er4z0r
er4z0r

Reputation: 4891

There is no such thing as a byte or short literal. You need to cast to short using (short)100

Upvotes: 41

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