矩形类

public class Rectanlge {
 int length;
 int width;
 int circle;
 int area;
 public int getcircle(int a,int b){
  length=a;
  width=b;
  return circle=2*(length+width);
 }
 public int getarea(int a,int b){
  length=a;
  width=b;
  return area=length*width;
 }

}