Lamda表达式与各种类的使用

Lamda表达式与各种类的使用 学习基础

任何接口，如果只包含唯一一个抽象方法，那么它就是函数式接口（Function Interface）

public interface Runnable{
	public abstract void run();
}

1. 实现类

public class TestLamda {
    public static void main(String[] args){
        Like like;
        like = new Like();
        like.Lamda();
    }
}

interface ILike {
    public void Lamda();
}

//实现类
class Like implements ILike{
    @Override
    public void Lamda(){
        System.out.println("我喜欢");
    }
}

2. 静态内部类

public class TestLamda {
//静态内部类
    static class Like implements ILike{
        @Override
        public void Lamda(){
            System.out.println("我喜欢");
        }
    }

    public static void main(String[] args){
        Like like;
        like = new Like();
        like.Lamda();
    }
}

interface ILike {
    public void Lamda();

3. 局部内部类

public class TestLamda {
    public static void main(String[] args){
        //局部内部类
        class Like implements ILike{
            @Override
            public void Lamda(){
                System.out.println("我喜欢");
            }
        }
        ILike like;
        like = new Like();
        like.Lamda();
    }
}

interface ILike {
    public void Lamda();
}

4. 匿名内部类

public class TestLamda {

    public static void main(String[] args){
        ILike like;
        like = new ILike(){
            @Override
            public void Lamda() {
                System.out.println("我喜欢");
            }
        };
        like.Lamda();
    }
}

interface ILike {
    public void Lamda();
}

5. Lamda表达式

public class TestLamda {

    public static void main(String[] args){
        ILike like;
        like = () ->{
            System.out.println("我喜欢");
        };
        like.Lamda();
    }
}

interface ILike {
    public void Lamda();
}