org.plumelib.util

Class ArraysPlume.IntArrayComparatorLengthFirst

java.lang.Object

org.plumelib.util.ArraysPlume.IntArrayComparatorLengthFirst

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator<int[]>

Enclosing class:

ArraysPlume

public static final class ArraysPlume.IntArrayComparatorLengthFirst
extends java.lang.Object
implements java.util.Comparator<int[]>, java.io.Serializable

Compare two arrays first by length (a shorter array is considered less), and if of equal length compare lexically (element-by-element).

Note: this comparator imposes orderings that are inconsistent with Object.equals(java.lang.Object). That is, it may return 0 if the arrays contain identical numbers but are not equal according to equals().

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
IntArrayComparatorLengthFirst()

Method Summary

Modifier and Type	Method and Description
int	compare(int[] a1, int[] a2) Compare two arrays by length, then lexically (element-by-element).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

IntArrayComparatorLengthFirst

public IntArrayComparatorLengthFirst()

Method Detail

compare

@Pure
public int compare(int[] a1,
                         int[] a2)

Compare two arrays by length, then lexically (element-by-element).

Specified by:

compare in interface java.util.Comparator<int[]>

Parameters:

a1 - first array to compare

a2 - second array to compare

Returns:

a negative integer, zero, or a positive integer, depending on whether the first argument is less than, equal to, or greater than the second argument