【JAVA】 JAVA8 中匿名类和Lamada表达式对比

使用Lamada表达式 更加简洁 直观；

 interface judgeOne{
    public boolean judge(Apple apple);
}
class Appleselecter{
//行为参数化
    public List getAppleList(List list,judgeOne filter){
        Listresult =new ArrayList();
        for(Apple apple: list){
            if(filter.judge(apple)){
                result.add(apple);
            }
        }
        return result;
    }
}
public class Main  {
    public static  void main(String[] args)  {
        Apple apple1=new Apple(1,"white");
        Apple apple2=new Apple(2,"white");
        Apple apple3=new Apple(3,"white");
        Apple apple4=new Apple(1,"black");
        List apples =new ArrayList<>();
        apples.add(apple1);
        apples.add(apple2);
        apples.add(apple3);
        apples.add(apple4);
        Appleselecter selector =new Appleselecter();
        //使用Lamada表达式 挑选出白色的苹果数量
        int a=selector.getAppleList(apples,(Apple apple) -> apple.getColor().equals("white")).size();
        //使用匿名内部类 挑选出重量大于等于1的苹果数量
        
        int b=selector.getAppleList(apples, new judgeOne() {
            @Override
            public boolean judge(Apple apple) {
                if(apple.getWeight()>=1) {
                    return true;
                }
                else {
                    return false;
                }
            }
        }).size();
    }
}