Question

Is there a java collection class that provides a filter method? I’m a little new to java so navigating all the collection classes and all the subtle ways they intertwine with interfaces is a little confusing. What I would like is a collection class that does the following:

FilterableCollection<SomeClass> collection = new FilterableCollection<SomeClass>();

// add some elements to the collection

// filter the collection and only keep certain elements
FilterableCollection<SomeClass> filtered_collection = collection.filter(
  new Filter<SomeClass>() {
    @Override
    public boolean test(SomeClass obj) {
      // determine whether obj passes the test or not
    }
  }
);

Answer 1

Check out this post. What is the best way to filter a Java Collection? It has a great example and should be exactly what you’re looking for.