Java Collection Intersect intersect(Collection<T> collA, Collection<T> collB, Collection<T> target)

Description

return a new Collection with the elements which appear both in a and b.
Complexity: for sets - linear, for lists - quadratic.

License

Open Source License

Parameter

Parameter	Description
T	a parameter
collA	a parameter
collB	a parameter
target	a collection that will be returned by this method. It will be cleared by this method before inserting the required elements.

Return

a new Collection with the elements which appear both in a and b

Declaration

public static <T> Collection<T> intersect(Collection<T> collA, Collection<T> collB, Collection<T> target)

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.Collection;

public class Main {
    /**//from  w  w w .j  av a2 s  .com
     * return a new Collection with the elements which appear both in a and b.<BR>
     * <B>Complexity:</B> for sets - linear, for lists - quadratic.
     * 
     * @param <T>
     * @param collA
     * @param collB
     * @param target a collection that will be returned by this method. It will be cleared by this method before inserting the required elements. 
     * @return a new Collection with the elements which appear both in a and b 
     */
    public static <T> Collection<T> intersect(Collection<T> collA, Collection<T> collB, Collection<T> target) {
        target.clear();

        for (T elem : collA) {
            if (collB.contains(elem)) {
                target.add(elem);
            }
        }
        return target;
    }
}

Java Collection Intersect intersect(Collection collA, Collection collB, Collection target)