lambda表达式学习

public class Lambda {

    //2、静态内部类
    static class StudentImpl2 implements Student {

        @Override
        public void read() {
            System.out.println("正在在背英语单词-2");
        }
    }

    public static void main(String[] args) {
        //1、普通实现类
        Student student = new StudentImpl();
        student.read();

        //2、静态内部类
        Student student2 = new StudentImpl2();
        student2.read();

        //3、局部内部类
        class StudentImpl3 implements Student {
            @Override
            public void read() {
                System.out.println("正在在背英语单词-3");
            }
        }

        Student student3 = new StudentImpl3();
        student3.read();

        //4、匿名内部类，没有类的名称，必须要借助接口或者父类。
        Student student4 = new Student() {
            @Override
            public void read() {
                System.out.println("正在在背英语单词-4");
            }
        };

        student4.read();

        //5、用lambda表达式简化
        //使用lambda表达式要满足，接口只有一个抽象方法。
        Student student5 = ()->System.out.println("正在在背英语单词-5");
        student5.read();

    }

}

interface Student {
    void read();
}

//1、普通实现类
class StudentImpl implements Student {

    @Override
    public void read() {
        System.out.println("正在在背英语单词-1");
    }
}