public?class?Building?{

public?String?bname;//建筑物名稱

public?int?floors;//代表總層數

public?double?area;//代表總面積

public?Building(){

}

public?Building(String?bname,?int?floors,?double?area)?{

this.bname?=?bname;

this.floors?=?floors;

this.area?=?area;

}

}public?class?Classroom?extends?Building{

private?int?rooms;//代表教室數

private?int?es;//滅火器數

public?Classroom()?{

}

public?Classroom(String?bname,int?floors,double?area,int?rooms,?int?es)?{

super(bname,floors,area);

this.rooms?=?rooms;

this.es?=?es;

}

void?display(){

System.out.println(toString());

}

@Override

public?String?toString()?{

return?"Classroom{"?+

"rooms="?+?rooms?+

",?es="?+?es?+

",?bname='"?+?bname?+?'\''?+

",?floors="?+?floors?+

",?area="?+?area?+??'}';

}

}Classroom?classroom?=?new?Classroom("清華大學",10,50000.0,25,15);//main方法自己寫,我寫不下了

classroom.display();

總結

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