Lambda表达式.pdf
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2019-10-31
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Lambda表达式
package com.zhuzhuxia.demo;1
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import com.alibaba.fastjson.JSON;
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import com.alibaba.fastjson.JSONArray;
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import com.google.common.collect.Lists;
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import org.junit.jupiter.api.Test;
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import java.util.Comparator;
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import java.util.List;
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import java.util.Map;
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import java.util.stream.Collectors;
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/**
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* @Author: 猪猪侠
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* @Date: 2019/10/30 17:59
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* @Version: 1.0
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* @Description:
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*/
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public class MyTest {
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@Test
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public void listTest(){
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List<Integer> integerList = Lists.newArrayList(1, 2, 3, 4, 5, 6,
3, 5, 1, 4, 2, 8, 9);
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List<Student> studentList = Lists.newArrayList();
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Student stu1 = new Student(1L,"张三",15);
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Student stu2 = new Student(2L,"李四",11);
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Student stu3 = new Student(3L,"王五",12);
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Student stu4 = new Student(4L,"赵六",10);
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studentList.add(stu1);
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studentList.add(stu2);
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studentList.add(stu3);
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studentList.add(stu4);
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System.out.println("学生原数据："+JSONArray.toJSON(studentList));
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System.out.println("----------------------------------------------
-------");
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List<Student> collect1 = studentList.stream().filter(stu ->
stu.getName().equals("张三")).collect(Collectors.toList());
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System.out.println("查出姓名是“张三”的学
生："+JSONArray.toJSON(collect1));
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