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Stream流应用

news 2025/8/11 8:59:41

本文总结自黑马阿伟的Java下，因为项目用得多，然后资料没有，所以总结一下：

题目：

实体类：

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;@Data
@AllArgsConstructor
@NoArgsConstructor
public class Actor {private String name;private Integer age;
}

答案：

	@Testvoid method_05() {//1.创建两个ArrayList集合ArrayList<String> manList = new ArrayList<>();ArrayList<String> womenList = new ArrayList<>();//2.添加数据Collections.addAll(manList, "蔡坤坤,24", "叶不翔,23", "刘不甜,22", "吴签,24", "谷嘉,30", "肖梁梁,27");Collections.addAll(womenList, "赵小颖,35", "杨颖,36", "高元元,43", "张天天,31", "刘诗,35", "杨小幂,33");//3.男演员只要名字为3个字的前两人Stream<String> stream1 = manList.stream().filter(s -> s.split(",")[0].length() == 3).limit(2);//.forEach(System.out::println);//4.女演员只要姓杨的，并且不要第一个Stream<String> stream2 = womenList.stream().filter(s -> s.split(",")[0].startsWith("杨")).skip(1);//.forEach(System.out::println);//5.把过滤后的男演员姓名和男演员姓名合并到一起List<Actor> list = Stream.concat(stream1, stream2).map(s ->new Actor(s.split(",")[0], Integer.parseInt(s.split(",")[1]))).collect(Collectors.toList());System.out.println(list);}

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