public class CrosstabKeyComparator extends Object implements Comparator<Object[]>
| Modifier and Type | Field and Description |
|---|---|
static CrosstabKeyComparator |
INSTANCE |
| Constructor and Description |
|---|
CrosstabKeyComparator() |
| Modifier and Type | Method and Description |
|---|---|
int |
compare(Object[] key1,
Object[] key2)
Compares its two arguments for order.
|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitcomparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLongpublic static final CrosstabKeyComparator INSTANCE
public int compare(Object[] key1, Object[] key2)
The implementor must ensure that sgn(compare(x, y)) == -sgn(compare(y, x)) for all x and y. (This implies that compare(x, y) must throw an exception if and only if compare(y, x) throws an exception.)
The implementor must also ensure that the relation is transitive: ((compare(x, y)>0) && (compare(y, z)>0)) implies compare(x, z)>0.
Finally, the implementer must ensure that compare(x, y)==0 implies that sgn(compare(x, z))==sgn(compare(y, z)) for all z.
It is generally the case, but not strictly required that (compare(x, y)==0) == (x.equals(y)). Generally speaking, any comparator that violates this condition should clearly indicate this fact. The recommended language is "Note: this comparator imposes orderings that are inconsistent with equals."
compare in interface Comparator<Object[]>key1 - the first object to be compared.key2 - the second object to be compared.ClassCastException - if the arguments' types prevent them from being compared by this Comparator.