public interface CharComparator
char
values.
This is a @FunctionalInterface
even though it isn't declared as one,
so that it can be used in Java 6+.
Modifier and Type | Method and Description |
---|---|
int |
compare(char c1,
char c2)
Compares
c1 and c2 . |
int compare(char c1, char c2)
c1
and c2
. Returns a negative value to indicate
that c1 < c2
, 0 to indicate that c1 == c2
, and a positive
value to indicate that c1 > c2
.
Implementations of this method must maintain the following invariants:
s(compare(x, y)) == -s(compare(y, x))
s(compare(x, y)) == s(compare(y, z))
→
s(compare(x, y)) == s(compare(x, z))
(transitivity)
compare(x, y) == 0
→
s(compare(x, z)) == s(compare(y, z))
∀ z
where s(x)
is defined as follows:
x < 0
: -1
x == 0
: 0
x > 0
: 1
c1
- the first char to comparec2
- the second char to comparec1
is less than, equal to, or greater than c2
,
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