那些年，一起学的Java 3-3
/**实验3.3
* 实现矩形类其中包括计算矩形周长和面积的方法
**/
public class adu
{
public static void main (String[] args)
{
Rectangle rectangle1 = new Rectangle (3, 12);
Rectangle rectangle2 = new Rectangle (8, 21);
System.out.println("rectangle1's perimeter : " + rectangle1.perimeter());
System.out.println("rectangle1's area : " + rectangle1.area());
System.out.println("rectangle2's perimeter : " + rectangle2.perimeter());
System.out.println("rectangle2's area : " + rectangle2.area());
}
}
class Rectangle
{
private int length;
private int width;
Rectangle(int l, int w)
{
this.length = l;
this.width = w;
}
int perimeter ()
{
return (length + width) * 2;
}
int area ()
{
return length * width;
}
}转载于:https://blog.51cto.com/anglecode/1619843