package?com;
public?abstract?class?Shape?{
static?double?Pi=3.14;
//抽象類方法定義
public?abstract?double?changzhouchang(double?a,double?b);
public?abstract?double?circlezhouchang(double?c);
public?abstract?double?changmianji(double?a,double?b);
public?abstract?double?circlemianji(double?c);
}
package?com;
public?class?Caculate?extends?Shape?{
//方法實(shí)現(xiàn)
public?double?changzhouchang(double?a,double?b)?{
return?(a+b)*2;
}
public?double?circlezhouchang(double?c)?{
return?2*Pi*c;
}
public?double?changmianji(double?a,double?b)?{
return?a*b;
}
public?double?circlemianji(double?c)?{
return?Pi*c*c;
}
}
package?com;
import?java.util.*;
public?class?Test?{
public?static?void?main(String[]?args)?{
//?TODO?Auto-generated?method?stub
double?a,b,c;
System.out.println("程序開始:");
Scanner?scanner=new?Scanner(System.in);
System.out.println("請(qǐng)輸入長(zhǎng)方形的長(zhǎng)，款，圓形的半徑：");
a=scanner.nextDouble();
b=scanner.nextDouble();
c=scanner.nextDouble();
Caculate?caculate?=new?Caculate();
System.out.println("長(zhǎng)方形周長(zhǎng)為："+caculate.changzhouchang(a,?b)+"\n"+"長(zhǎng)方形面積為："+caculate.changmianji(a,?b)+"\n"+"圓形周長(zhǎng)為："+caculate.circlezhouchang(c)+"\n"+"圓形面積為："+caculate.circlemianji(c));
scanner.close();
}
}