What is the best way to filter a Java Collection?

Question

I want to filter a java.util.Collection based on a predicate.

Answer 1

With Guava:

Collection collection = Lists.newArrayList(1, 2, 3, 4, 5);

Iterators.removeIf(collection.iterator(), new Predicate() {
    @Override
    public boolean apply(Integer i) {
        return i % 2 == 0;
    }
});

System.out.println(collection); // Prints 1, 3, 5