使用集合查询引擎(CQEngine)。这是目前为止最快的方法。

请参见:如何在Java中查询对象集合(Criteria/SQL-like)?

您可以使用ForEach DSL编写

import static ch.akuhn.util.query.Query.select;
import static ch.akuhn.util.query.Query.$result;
import ch.akuhn.util.query.Select;

Collection<String> collection = ...

for (Select<String> each : select(collection)) {
    each.yield = each.value.length() > 3;
}

Collection<String> result = $result();

给定一个集合[The, quick, brown, fox, jumping, over, The, lazy, dog]，结果是[quick, brown, jumping, over, lazy]，即所有字符串都长于三个字符。

ForEach DSL支持的所有迭代样式都是

AllSatisfy AnySatisfy 收集 Counnt CutPieces 检测 GroupedBy IndexOf InjectInto 拒绝 选择

更多详情请参考https://www.iam.unibe.ch/scg/svn_repos/Sources/ForEach

设置:

public interface Predicate<T> {
  public boolean filter(T t);
}

void filterCollection(Collection<T> col, Predicate<T> predicate) {
  for (Iterator i = col.iterator(); i.hasNext();) {
    T obj = i.next();
    if (predicate.filter(obj)) {
      i.remove();
    }
  }
}

的用法:

List<MyObject> myList = ...;
filterCollection(myList, new Predicate<MyObject>() {
  public boolean filter(MyObject obj) {
    return obj.shouldFilter();
  }
});

您确定要筛选Collection本身，而不是迭代器吗?

看到org.apache.commons.collections.iterators.FilterIterator

或者使用apache commons的第四版org.apache.commons.collections4.iterators.FilterIterator

JFilter http://code.google.com/p/jfilter/最适合您的需求。

JFilter是一个简单、高性能的开源库，用于查询Java bean集合。

关键特性

Support of collection (java.util.Collection, java.util.Map and Array) properties. Support of collection inside collection of any depth. Support of inner queries. Support of parameterized queries. Can filter 1 million records in few 100 ms. Filter ( query) is given in simple json format, it is like Mangodb queries. Following are some examples. { "id":{"$le":"10"} where object id property is less than equals to 10. { "id": {"$in":["0", "100"]}} where object id property is 0 or 100. {"lineItems":{"lineAmount":"1"}} where lineItems collection property of parameterized type has lineAmount equals to 1. { "$and":[{"id": "0"}, {"billingAddress":{"city":"DEL"}}]} where id property is 0 and billingAddress.city property is DEL. {"lineItems":{"taxes":{ "key":{"code":"GST"}, "value":{"$gt": "1.01"}}}} where lineItems collection property of parameterized type which has taxes map type property of parameteriszed type has code equals to GST value greater than 1.01. {'$or':[{'code':'10'},{'skus': {'$and':[{'price':{'$in':['20', '40']}}, {'code':'RedApple'}]}}]} Select all products where product code is 10 or sku price in 20 and 40 and sku code is "RedApple".

考虑使用支持泛型的更新的Collections框架谷歌Collections。

更新:谷歌集合库现在已弃用。你应该使用最新发布的番石榴。它仍然具有对集合框架的所有相同扩展，包括基于谓词进行筛选的机制。