Methodcall Selection by Parameter Type

Added by blackdrag, last edited by blackdrag on Oct 12, 2006

proposed method selection precendece rules for numbers:

  byte Byte short Short int Integer long Long BigInteger float Float double Double BigDecimal Number Object
byte 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Byte 1 0 2 3 4 5 6 7 8 9 10 11 12 13 14 15
short 0 1 2 3 4 5 6 7 8 9 10 11 12 13
Short 1 0 2 3 4 5 6 7 8 9 10 11 12 13
int 0 1 2 3 4 5 6 7 8 9 10 11
Integer 1 0 2 3 4 5 6 7 8 9 10 11
long 0 1 2 3 4 5 6 7 8 9
Long 1 0 2 3 4 5 6 7 8 9
BigInteger 0 1 2 3 4 5 6 7
float 0 1 2 3 4 5 6
Float 1 0 2 3 4 5 6
double 0 1 2 3 4
Double 1 0 2 3 4
BigDecimal 0 1 2
Number 0 1
Object 0

= not possible. A lower number means that type is prefered over a type with a higher number.

for example calling a method foo with an argument of type Short, and I have these methods:

def foo(long y){}
def foo(BigDecimal y){}

Then the method with the long is used, because it gets the number 4 and BigDecimal 11.

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