package com.read.JDK8;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.function.Predicate;
import java.util.stream.Collectors;

public class Demo1_2_2_test {
    public static void main(String[] args) {
        List<People> inventory = Arrays.asList(
                new
 
 People("wang", 10),
                new People("wang", 10),
                new People("zhao", 30),
                new People("qian", 21),
                new People("qian", 15)
        );

        // 選出name == wang
        List<People> wangPeople = filterPeople(inventory, Demo1_2_2_test::isWang); // 類直接呼叫方法
 

        System.out.println(wangPeople);

        // 選出name == qian 並且 age >15
        List<People> qianPeo = filterPeople(inventory, (People p) -> "qian".equals(p.getName()) && p.getAge() > 15);
        System.out.println(qianPeo);

        // 流處理
        List<People> tPeople = inventory.stream().filter(people -> people.getAge() > 15
 
).collect(Collectors.toList());
        System.out.println(tPeople);
    }


    public static boolean isWang(People people) {
        return "wang".equals(people.getName());
    }

    public static List<People> filterPeople(List<People> inventory, Predicate<People> peoplePredicate) {
        List<People> result = new ArrayList<>();
        for (People p : inventory) {
            if (peoplePredicate.test(p)) { //對傳入的方法進行測試 判斷是否正確
                result.add(p);
            }
        }
        return result;
    }

    public static class People {
        private String name;
        private int age;

        public People(String name, int age) {
            this.name = name;
            this.age = age;
        }

        @Override
        public String toString() {
            return "People{" +
                    "name='" + name + '\'' +
                    ", age=" + age +
                    '}';
        }

        public String getName() {

            return name;
        }

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

        public int getAge() {
            return age;
        }

        public void setAge(int age) {
            this.age = age;
        }
    }
}
package com.read.JDK8;

        import java.util.ArrayList;
        import java.util.Arrays;
        import java.util.List;
        import java.util.function.Predicate;
        import java.util.stream.Collectors;

public class Demo1_2_2_test {
    public static void main(String[] args) {
        List<People> inventory = Arrays.asList(
                new People("wang", 10),
                new People("wang", 10),
                new People("zhao", 30),
                new People("qian", 21),
                new People("qian", 15)
        );

        // 選出name == wang
        List<People> wangPeople = filterPeople(inventory, Demo1_2_2_test::isWang); // 類直接呼叫方法
        System.out.println(wangPeople);

        // 選出name == qian 並且 age >15
        List<People> qianPeo = filterPeople(inventory, (People p) -> "qian".equals(p.getName()) && p.getAge() > 15);
        System.out.println(qianPeo);

        // 流處理
        List<People> tPeople = inventory.stream().filter(people -> people.getAge() > 15).collect(Collectors.toList());
        System.out.println(tPeople);
    }


    public static boolean isWang(People people) {
        return "wang".equals(people.getName());
    }

    public static List<People> filterPeople(List<People> inventory, Predicate<People> peoplePredicate) {
        List<People> result = new ArrayList<>();
        for (People p : inventory) {
            if (peoplePredicate.test(p)) { //對傳入的方法進行測試 判斷是否正確
                result.add(p);
            }
        }
        return result;
    }

    public static class People {
        private String name;
        private int age;

        public People(String name, int age) {
            this.name = name;
            this.age = age;
        }

        @Override
        public String toString() {
            return "People{" +
                    "name='" + name + '\'' +
                    ", age=" + age +
                    '}';
        }

        public String getName() {

            return name;
        }

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

        public int getAge() {
            return age;
        }

        public void setAge(int age) {
            this.age = age;
        }
    }
}