Hey , i hope i get help with this.
im a coder of a rsps (runescape private server)
and in this game you could like have items and weapons
and the max anmount of a item you can have is 2147000000
and i can change the amount of the max by changing this int
public int maxItemAmount = 2147000000;
and it works
but i want to make it like 3000000000
and i do this
public int maxItemAmount = 3000000000;
and when i compile i get this error
integrer number too large开发者_Python百科: 3000000000
please guys help me out if you can :)
Integer has an upper bound of 2^31 (2147483648). If you want numbers longer than that, you can use a long or double.
Integers are signed 32-bit values and thus can have a maximum value of 231 = (note that one bit is used for the sign).
You need to change the type of maxItemAmount
to long.
you should go for 64 bit types ... i.e: long
...
do ...
public long maxItemAmount = 3000000000L;
A 32-bit signed integer has a range of -232 to 232-1, or − 2,147,483,648 to 2,147,483,647. If you want an integral value outside this range you need to use a 64-bit (long) variable. On the other hand, how likely is it that anyone will have over 2 billion distinct items or weapons? Perhaps, you want to rethink it and keep track of items and their quantities separately. You might also want to consider that changing to use a long may have unexpected consequences if parts of the code assume that it's a 32-bit value.
You can check out the max value of numbers with Integer.MAX_VALUE and Long.MAX_VALUE.
If a long is still not enough for your needs, you can check out the BigInteger class.
Instead of int
you should use long
. Here you can find more information about the precision of Java primitive data types.
Quoting from the link:
long: The long data type is a 64-bit signed two's complement integer. It has a minimum value of -9,223,372,036,854,775,808 and a maximum value of 9,223,372,036,854,775,807 (inclusive). Use this data type when you need a range of values wider than those provided by int.
As other people has sayed, you have to use another data type that support big numbers.
I recommend you using long
. For example:
public long maxItemAmount = 3000000000L;
Notice the L
at the end of the value. It tells the runtime that 3000000000 is a long
value. Or use:
public long maxItemAmount = new Long("3000000000");
See more info on this page.
Also, someone commented using a BigInteger
. It's like a String
; don't have limit.
However, I recommend you to use it rarely. A long
will probably suit your needs.
EDIT: Strictly speaking, BigInteger
s and String
s have limit (see comments).
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