樓上的方法應(yīng)該沒錯(cuò),可感覺對(duì)于表現(xiàn)java面向?qū)ο蟮奶匦詻]有表現(xiàn)出來,下面是我寫的,應(yīng)該非常清楚明了了
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Circle
{
int radius; //定義變量半徑
double perimeter() //周長(zhǎng)方法
{
return radius*2*3.14;
}
double area() //面積方法
{
return radius*radius*3.14;
}
public static void main(String[] agrs)
{
try
{
BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
System.out.println("你好,請(qǐng)輸入半徑:");
//得到鍵盤輸入的一行,并轉(zhuǎn)化為整型!
Circle circle = new Circle(); //
circle.radius = Integer.parseInt(buf.readLine());
System.out.println("周長(zhǎng)為"+circle.perimeter());
System.out.println("面積為"+circle.area());
}
catch (Exception e)
{
System.out.println(e.toString());
}
}
}