Module io.jenetics.base

Package io.jenetics.util

Interface ProxySorter.Comparator<T>

Type Parameters:

T - the array type, e.g. int[], double[] or Seq<String>

Enclosing class:

ProxySorter

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public static interface ProxySorter.Comparator<T>

The comparator used for comparing two array elements at the specified indexes.

final ProxySorter.Comparator<double[]> comparator =
    (a, i, j) -> Double.compare(a[i], a[j]);

The example above shows how to create a comparator for double[] arrays.

Since:

5.1

Version:

5.1

See Also:

• ProxySorter.sort(Object, int, Comparator)
• ProxySorter

Method Summary

Modifier and Type	Method	Description
int	compare(T array, int i, int j)	Compares the two array elements, specified by its indices, for order.
default ProxySorter.Comparator<T>	reversed()	Returns a comparator that imposes the reverse ordering of this comparator.

Method Details

compare

int compare(T array,
 int i,
 int j)

Compares the two array elements, specified by its indices, for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

Parameters:

array - the array where the two comparing elements are fetched

i - the index of the first array element

j - the index of the second array element

Returns:

a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

Throws:

NullPointerException - if an argument is null and this comparator does not permit null arguments

See Also:

• Comparator.compare(Object, Object)

reversed

default ProxySorter.Comparator<T> reversed()

Returns a comparator that imposes the reverse ordering of this comparator.

Returns:

a comparator that imposes the reverse ordering of this comparator.