JAVA问题啊,请速度回答

//这是Person 类
class person
{
private String name;
private String addr;
//这里你吧上面我的那个属性给加个get set 方法

}
//这是继承出来的Teacher

class teacher extends person
{
private String professional="";//专业
private String title="";//职称
private String courses="";//课程
public String getProfessional()
{
return professional;
}
public void setProfessional(String professional)
{
this.professional=professional;
}
public String getTitle()
{
return title;
}
public void setTitle(String title)
{
this.title=title;
}
public String getCourses()
{
return courses;
}
public void setCourses(String courses)
{
this.courses=courses;
}
}

class person
{

}

class teacher extends person
{
private String professional="&q