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Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time.

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On Sunday, January 13, 2013 9:56:07 PM UTC-5, Daniel Pitts wrote:
> On 1/13/13 5:38 PM, GCRhoads@volcanomail.com wrote:
> 
> >
> 
> > class Piece
> 
> >     {
> 
> >     public byte type;
> 
> >     public byte loc;
> 
> >     }
> 
> >
> 
> > class Config
> 
> >     {
> 
> >     public Config( int n ) { piece = new Piece[ n ]; }
> 
> >     private Piece[] piece;      // array whose size is not known at compile time
> 
> >     private int next;
> 
> >     private int parent;
> 
> >     }
> 
> >
> 
> > class QHT
> 
> >     {
> 
> >     private Config[] conf;
> 
> >     public QHT (int m, int n );
> 
> >     }
> 
> >
> 
> > In the constructor QHT, I want to allocate to "conf" an array of m Configs
> 
> > where each Config contains an array of n "Piece"s.  The values of m and n
> 
> > are not known at compile time only at run time.
> 
> >
> 
> > How can I do this in Java?
> 
> >
> 
> > P.S. If you respond by email, please use the following address.
> 
> > r h o a d s @ c s (dot) r u t g e r s (dot) e d u
> 
> >
> 
> >
> 
> >
> 
> Java arrays don't get instantiated at compile time, so you just do it 
> 
> the way you create arrays in Java.
> 
> 
> 
> Hint: You have an example of part of it in he Config constructor already.
> 
> Another Hint: Do your own damned homework.

This is NOT homework.

Sure I can write.

conf = new Config[ m ]
for (int i=0; i < m; i++)
   conf[i] = new Config( n );

but I need to ensure that the memory returned by the successive calls to
"new Config( n )" occupy contiguous memory locations.  I know how to do this in
C or C++ but the solution uses pointer arithmetic which Java doesn't have.

How can I do this in Java?

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Array of a Class Type that contains an array where the sizes of the array are not known at compile time. GCRhoads@volcanomail.com - 2013-01-13 17:38 -0800
  Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-01-13 18:56 -0800
    Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. GCRhoads@volcanomail.com - 2013-01-14 13:36 -0800
      Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Eric Sosman <esosman@comcast-dot-net.invalid> - 2013-01-14 16:59 -0500
        Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. GCRhoads@volcanomail.com - 2013-01-14 20:00 -0800
          Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. GCRhoads@volcanomail.com - 2013-01-14 20:04 -0800
            Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Patricia Shanahan <pats@acm.org> - 2013-01-14 23:44 -0800
            Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Eric Sosman <esosman@comcast-dot-net.invalid> - 2013-01-15 09:07 -0500
          Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2013-01-15 09:06 +0200
          Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Eric Sosman <esosman@comcast-dot-net.invalid> - 2013-01-15 08:32 -0500
          Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Lew <lewbloch@gmail.com> - 2013-01-15 11:19 -0800
          Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Joshua Cranmer <Pidgeot18@verizon.invalid> - 2013-01-15 13:52 -0600
      Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Roedy Green <see_website@mindprod.com.invalid> - 2013-01-15 20:56 -0800
  Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. markspace <markspace@nospam.nospam> - 2013-01-13 19:01 -0800
    Re: Array of a Class Type that contains an array where the sizes of the array are not known at compile time. Lew <lewbloch@gmail.com> - 2013-01-13 21:39 -0800

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