title: Java error: class, interface, or enum expected,
body: <pre><code>import java.util.*;
  
  class box
  {
     int h,w,d;
  }
  
  void volume()
  {
     System.out.println("Volume="+(w*h*d));
  }
  
  class boxdemo
  {
     public static void main(String arg[])
     {
        box b1=new box();
        box b2=new box();
        b1.h=10;
        b1.w=20;
        b1.d=30;
        b2.h=20;
        b2.w=30;
        b2.d=40;
        b1.volume;
        b2.volume;
     }
  }
  </code></pre>
  
  <p>What's wrong with the code? please send me the correct code. It shows two errors saying class,interface or enum expected.</p>