java为学生s1的age属性_求解java程序，题目如下
慕冬雪
public?class?Student?{
protected?int?id;
protected?String?name;
protected?int?age;
public?Student(int?id,?String?name,?int?age)?{
this.id?=?id;
this.name?=?name;
this.age?=?age;
}
public?int?getId()?{
return?id;
}
public?void?setId(int?id)?{
this.id?=?id;
}
public?String?getName()?{
return?name;
}
public?void?setName(String?name)?{
this.name?=?name;
}
public?int?getAge()?{
return?age;
}
public?void?setAge(int?age)?{
this.age?=?age;
}
@Override
public?String?toString()?{
return?"Student?[id="?+?id?+?",?name="?+?name?+?",?age="?+?age?+?",?getId()="?+?getId()?+?",?getName()="
+?getName()?+?",?getAge()="?+?getAge()?+?",?getClass()="?+?getClass()?+?",?hashCode()="?+?hashCode()
+?",?toString()="?+?super.toString()?+?"]";
}
}public?class?Graduate?extends?Student{
protected?String?tutorName;
public?Graduate(int?id,?String?name,?int?age,?String?tutorName)?{
super(id,?name,?age);
this.tutorName?=?tutorName;
}
public?String?getTutorName()?{
return?tutorName;
}
public?void?setTutorName(String?tutorName)?{
this.tutorName?=?tutorName;
}
}public?class?Test?{
public?static?void?main(String[]?args)?{
Student?s1?=?new?Student(1,?"John",?20);
Graduate?g1?=?new?Graduate(100,?"Alice",?24,?"Mr?Zhang");
g1.setTutorName("Mr?Zhao");
}
}
總結
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