public class RectangleTest2 {
    public static void main(String[] args) {
            Rectangle obj=new Rectangle(2,3);
            System.out.println("举行的长和宽是："+obj.length+","+obj.width);
            int result=obj.area();
            System.out.println("矩形的面积是："+result);
            }
    }

class Rectangle()
{
    int length=1,width=1;
    public int area()
    {
        int temp=length*width;
        return temp;
    }
    public Rectangle(int x,int y){
        length=x;
        width=y;
    }
}

谢谢

哈哈，还是有问题的