用java编译一个计算长方形的周长与面积

import java.io.*;
class CBox
{
int width;
int height;

int perimeter(int width,int height)
{
return 2*(width+height);
}
int area(int width,int height )
{
return width*height;
}
}
public class chang
{
public static void main(String args[])throws IOException
{
int a,b;
String str;
BufferedReader buf1,buf2;

buf1=new BufferedReader(new InputStreamReader(System.in));
buf2=new BufferedReader(new InputStreamReader(System.in));

System.out.print("请输入2个数的值：");
str=buf1.readLine();
a=Integer.parseInt(str);

str=buf2.readLine();
b=Integer.parseInt(str);

System.out.println(a+" "+b);

CBox rect1=new CBox();

System.out.println("周长为："+rect1.perimeter(a,b));
System.out.println("面积为："+rect1.area(a,b));
}
}

我觉得把