Use Lambda expression to iterate collection members

T__God

于 2016-08-03 12:23:13 发布

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分类专栏： Java-se 文章标签： lambda java

本文链接：https://blog.youkuaiyun.com/T_GodLile/article/details/52102437

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本文介绍了如何使用 Java 8 中新增的 Lambda 表达式来简化集合成员的遍历操作。通过示例对比了传统迭代器方式与 Lambda 表达式的使用方法，展示了 Lambda 表达式带来的简洁性和便利性。

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There are many ways to iterate collection members,but lambda expression is more convienient (java 8 new features)now show it below：
import java.util.*;
public class IteratorTest {
public static void main(String[] args) {
Collection books = new HashSet();
books.add(“Crazy Java books.”);
books.add(“Java Programming and Applications”);
books.add(“Control Yourself”)
//use lambda expression
books.forEach(obj->System.out.println(“members are:”+obj);
//Create a iterator
Iterator iterator = books.iterator();
//use method in iterator to iterate members of collection.It’s complicated.
/*while (iterator.hasNext()) {
String book = (String) iterator.next();
System.out.println(book);
}*/
//use lambda
iterator.forEachRemaining(obj->System.out.println(“Member are below:”+obj));
System.out.println(books);