Question

怎么调用接口中类（对象）的参数，并赋值？

有实体类Student
接口IStudentDao
实现类StudentImpl

public interfase IStudentDao {

public int save(Student s);

}

怎么在测试类main方法中调用save并给它赋值

Answer 1

案例演示
public static void main(String[] args) {

IStudentDao iStudentDao =new StudentImpl();
Student s=new Student("zs","123");
iStudentDao.save(s);

}