List<String> strings = Arrays.asList("Hollis", "HollisChuang", "hollis","Hollis666", "Hello", "HelloWorld", "Hollis");
strings  = strings.stream().filter(string -> string.startsWith("Hollis")).collect(Collectors.toList());
System.out.println(strings);
//Hollis, HollisChuang, Hollis666, Hollis	
		
			

最佳替代方案

			
	        Stream<String> stream = Stream.of("Apple", "Banana", "Coconut");
	        List<String> fruits = stream.toList();
	        fruits.forEach(System.out::println);		
			
			

连接字符串

		
        Stream<String> stream = Stream.of("https://", "www.netkiller.cn", "/java/index.html");
        String url = stream.collect(Collectors.joining());
        System.out.println(url);		
		
			

			
Set<String> studentNames=students.stream().map(student -> student.getName()).collect(Collectors.toSet());			
			
			

teeing 收集器已公开为静态方法Collectors::teeing。该收集器将其输入转发给其他两个收集器，然后将它们的结果使用函数合并。

		
package cn.netkiller.demo;

public class Student {
	public String name;
	public int score;

	public Student(String name, int score) {
		this.name = name;
		this.score = score;

	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getScore() {
		return score;
	}

	public void setScore(int score) {
		this.score = score;
	}

	@Override
	public String toString() {
		return "Student [name=" + name + ", score=" + score + "]";
	}

}

		
			

		
package cn.netkiller.demo;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;

public class Test {

	public Test() {
	}

	public static void main(String[] args) {

		List<Student> list = Arrays.asList(new Student("Neo", 80), new Student("Tom", 60), new Student("Jerry", 70));
		// 平均分 总分
		String result = list.stream().collect(Collectors.teeing(Collectors.averagingInt(Student::getScore), Collectors.summingInt(Student::getScore), (s1, s2) -> s1 + ":" + s2));
		// 最低分 最高分
		String result2 = list.stream().collect(Collectors.teeing(Collectors.minBy(Comparator.comparing(Student::getScore)), Collectors.maxBy(Comparator.comparing(Student::getScore)), (s1, s2) -> s1.orElseThrow() + ":" + s2.orElseThrow()));
		System.out.println(result);
		System.out.println(result2);
	}

}