FilterableArrayList.java

package com.blacklenspub.android.playground;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class FilterableArrayList<T> extends ArrayList<T> {

    public FilterableArrayList(Collection<? extends T> c) {
        super(c);
    }

    public List<T> filter(Predicate<T> predicate) {
        return filterTo(new ArrayList<T>(), predicate);
    }

    public <C extends Collection<? super T>> C filterTo(C destination, Predicate<T> predicate) {
        for (T element : this) if (predicate.check(element)) destination.add(element);
        return destination;
    }

}