importjava.util.ArrayList;importjava.util.Collection;importjava.util.List;importjava.util.concurrent.ConcurrentLinkedQueue;publicclassJavaCollectionRetainAllExample4{publicstaticvoidmain(String[] args){ Collection<Character> collection =newConcurrentLinkedQueue<Character>();charc;for(c='A';c<='Z';++c)...
常用的接口一般使用for循环来写,为的是在循环结束后释放已经使用过的对象资源。 ArrayList 继承自AbstractList类,而AbstractList类实现了Collection接口,AbstractList类提供了interator()迭代器方法,从Collection接口中继承了抽象的增、删、改、查方法。当然,Collection类中只是初步的定义了增和删两个操作,而没有涉及到改...
Remove items from a list which do not belong to a specified collection: import java.util.LinkedList; public class Main { public static void main(String[] args) { LinkedList<String> cars = new LinkedList<String>(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("Ma...
java 集合里面所有值的合 java中集合retainall Java后端开发 Java 集合类主要分为两大类:Collection 与 Map. 它们两是是Java集合框架的根接口。 1 Collection 框架 Collection 接口是List、Set、Queue接口的父接口,所以该接口定义的所有方法可用于操作这三个集合。Collection 定义了如下基本方法用于操作集合。 boolean ...
In the following code shows how to use Set.retainAll(Collection <?> c) method. //www.java2s.comimportjava.util.Collection;importjava.util.HashSet;importjava.util.Iterator;importjava.util.Set;importjava.util.TreeSet;publicclassMain {publicstaticvoidmain(String[] args) {// Create two sets.Se...
ISet.RetainAll(ICollection) Method Reference Feedback Definition Namespace: Java.Util Assembly: Mono.Android.dll Retains only the elements in this set that are contained in the specified collection (optional operation). C#Копіювати ...
Let’s see the retainAll() method of the ArrayList class in Java.This method is used to retain all the elements in of the collection in the list.IntroductionA...
Java documentation forjava.util.Collection.retainAll(java.util.Collection<?>). Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution License. ...
The cardinality of an element e in the returned list is the same as the cardinality of e in collection unless retain does not contain e, in which case the cardinality is zero. This method is useful if you do not wish to modify the collection c and thus cannot call collection.retainAll(...
适用于 . 的android.util.ArraySet.retainAll(java.util.Collection<?>)Java 文档 本页的某些部分是根据 Android 开放源代码项目创建和共享的工作进行的修改,并根据 Creative Commons 2.5 属性许可证中所述的术语使用。 适用于 产品版本 .NET for Android.NET for Android API 34, .NET for Android API 35, ...