Predicate接口引见

Predicate接口介绍

1、Predicate是Commons Collections中定义的一个接口。具体

import java.util.Collection;import org.apache.commons.collections.Predicate;/** * @author zoopnin *  * 功能：判读集合中是否存在指定的对象  *  *  */public class ContainsPredicate implements Predicate {private final Collection<?> objs;public ContainsPredicate(Collection<?> objs) {super();this.objs = objs;}public boolean evaluate(Object object) {if (object instanceof Collection<?>) {return objs.containsAll((Collection<?>) object);} else {return objs.contains(object);}}}

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