小编Whe*_*hen的帖子

This is the student class definition.

public class Student {
    public Student(String name) {
        this.name = name;
    }
    private String name;

    public String getName() {
        return name;
    }

}

The map function should accept like a Function interface

<R> Stream<R> map(Function<? super T, ? extends R> mapper);

That means the parameters should be like that

int func(int a){
    return b;
}

We need to make sure have one method parameter. So why getName() can work? The method actually change to …