JAVA-8 learn 01-02

 

package com.tianmeng.java8;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import static java.lang.Thread.currentThread;

/**
 * @program: java8
 * @descriptioin:
 * @author: TIANMENG
 * @date: 2019-11-14 22:19
 **/
public class FilterApple {

    //@FunctionalInterface
    public interface AppleFilter{
        boolean filter(Apple apple);
    }

    public static List findApple(List apples, AppleFilter appleFilter){
        List list = new ArrayList<>();
        for (Apple apple : apples){
            if (appleFilter.filter(apple)){
                list.add(apple);
            }
        }
        return list;
    }

    public static class GreenAnd160WeightFilter implements AppleFilter{
        @Override
        public boolean filter(Apple apple) {
            return apple.getColor().equals("green") && apple.getWeight() >= 160;
        }
    }

    public static List findGreenApple(List apples){
        List list = new ArrayList<>();
        for (Apple apple : apples){
            if ("green".equals(apple.getColor())){
                list.add(apple);
            }
        }
        return  list;
    }
    public static List findApple(List apples, String color){
        List list = new ArrayList<>();
        for (Apple apple : apples){
            if (apple.getColor().equals(color)){
                list.add(apple);
            }
        }
        return list;
    }
    public static void main(String[] args) throws InterruptedException {
         List list = Arrays.asList(
                 new Apple("green",150),
                 new Apple("yellow",120),
                 new Apple("green",170));
//         List greenApples = findGreenApple(list);
//         assert greenApples.size() == 2;

//        List greenApples = findApple(list,"green");
//        List redApples = findApple(list, "red");
//        System.out.println(greenApples);
//        System.out.println(redApples);

        List result = findApple(list, new GreenAnd160WeightFilter());
//        System.out.println(result);

        List yellowApple = findApple(list, new AppleFilter() {
            @Override
            public boolean filter(Apple apple) {
                return "yellow".equals(apple.getColor());
            }
        });
//        System.out.println(yellowApple);

        List lambdaResult = findApple(list, apple -> {
            return apple.getColor().equals("green");
        });
//        System.out.println(lambdaResult);


       new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println(currentThread().getName());
       }
        }).start();

       new Thread(() -> {
           System.out.println(currentThread().getName());
       }).start();

        currentThread().join();
        
    }

}