Re: Does any body help me!!

[Tiago Simas]

Many Thank's James.
T.

----- Original Message -----
From: "Marshall, James A R" <address@hidden>
To: <address@hidden>
Sent: Tuesday, August 13, 2002 4:03 AM
Subject: RE: Does any body help me!!


> Tiago,
>   your problem was caused by an attempt to access an element in a Grid2d
> object that was out of the bounds of that object. As with most things in
> programming languages (e.g. arrays), Grid2d's co-ordinate system starts at
> 0, meaning that the largest valid co-ordinate on a given axis is actually
> the size of the Grid2d on that axis minus 1, i.e.
> maxXcoord = xSize - 1
>   I've rewritten your code in Agent.java as follows:
>     // flat world
>     if (newX >= worldXSize)
>       newX = worldXSize - 1;
>     if (newY >= worldYSize)
>       newY = worldYSize - 1;
>     if (newX < 0)
>       newX = 0;
>     if (newY < 0)
>       newY = 0;
>
> Note that as well as changing
>   newX = worldXSize;
> to
>   newX = worldXSize - 1;
> and doing the same for newY, I've also changed
>   newX = 1;
> to
>   newX = 0;
> and similarly for newY
> as this maintains consistent behaviour for the agents at each edge of the
> grid.
>   You should really learn how to use the debugger (I think JBuilder has
one
> built in), and in conjunction with the Swarm javadocs you should be able
to
> solve most simple problems like this.
> James
>
> ---
> Dr James A R Marshall
> Container World Project - http://www.ese.ic.ac.uk/research/containerworld/
> Department of Earth Sciences and Engineering, Imperial College, London
> Tel: +44 (0)20 7594 7493
> Fax: +44 (0)20 7594 7444
>
>
> -----Original Message-----
> From: Tiago Simas [mailto:address@hidden
> Sent: 12 August 2002 20:10
> To: address@hidden
> Subject: Re: Does any body help me!!
>
>
> Hi, my source code is attach.
> Thank's
> Tiago.
>
> ----- Original Message -----
> From: "Marshall, James A R" <address@hidden>
> To: <address@hidden>
> Sent: Monday, August 12, 2002 12:13 PM
> Subject: RE: Does any body help me!!
>
>
> > Tiago,
> >   I suspect this may be a null-pointer exception, where an attempt is
made
> > to access an object that does not exist. Unless you include your soure
> code,
> > no-one will be able to help you further.
> > James
> >
> > ---
> > Dr James A R Marshall
> > Container World Project -
http://www.ese.ic.ac.uk/research/containerworld/
> > Department of Earth Sciences and Engineering, Imperial College, London
> > Tel: +44 (0)20 7594 7493
> > Fax: +44 (0)20 7594 7444
> >
> >
> > -----Original Message-----
> > From: Tiago Simas [mailto:address@hidden
> > Sent: 12 August 2002 19:10
> > To: address@hidden
> > Subject: Does any body help me!!
> >
> >
> > Hi, Swarm to me has been hard!!!
> > Anybody know what could be the possible problem with my program! I'm
using
> > JBuilder 6.0 with swarm in windows 2000 enviroment. I've received the
> > following message when I'm runing the program:
> >
> > An unexpected exception has been detected in native code outside the VM.
> > Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x1011d6e0
> > Function name=swarm_directory_objc_ensure_java
> > Library=C:\Swarm-2.1.1\bin\javaswarm.dll
> >
> > Current Java thread:
> >  at swarm.space.Grid2dImpl.getObjectAtX$Y(Native Method)
> >  at simpleagent.Agents.randomWalk(Agents.java:62)
> >  at swarm.simtoolsgui.GUISwarmImpl.go(Native Method)
> >  at simpleagent.StartAgents.main(StartAgents.java:22)
> >
> > Dynamic libraries:
> > 0x00400000 - 0x00405000  C:\JBuilder6\jdk1.3.1\bin\javaw.exe
> > 0x77F50000 - 0x77FF9000  C:\WINDOWS\System32\ntdll.dll
> > 0x77E60000 - 0x77F45000  C:\WINDOWS\system32\kernel32.dll
> > 0x77DD0000 - 0x77E5B000  C:\WINDOWS\system32\ADVAPI32.dll
> > 0x77CC0000 - 0x77D35000  C:\WINDOWS\system32\RPCRT4.dll
> > 0x77D40000 - 0x77DCD000  C:\WINDOWS\system32\USER32.dll
> > 0x77C70000 - 0x77CB0000  C:\WINDOWS\system32\GDI32.dll
> > 0x77C10000 - 0x77C63000  C:\WINDOWS\system32\MSVCRT.dll
> > 0x6D420000 - 0x6D4EF000  C:\JBuilder6\jdk1.3.1\jre\bin\hotspot\jvm.dll
> > 0x76B40000 - 0x76B6C000  C:\WINDOWS\System32\WINMM.dll
> > 0x6D220000 - 0x6D227000  C:\JBuilder6\jdk1.3.1\jre\bin\hpi.dll
> > 0x6D3B0000 - 0x6D3BD000  C:\JBuilder6\jdk1.3.1\jre\bin\verify.dll
> > 0x6D250000 - 0x6D266000  C:\JBuilder6\jdk1.3.1\jre\bin\java.dll
> > 0x6D3C0000 - 0x6D3CD000  C:\JBuilder6\jdk1.3.1\jre\bin\zip.dll
> > 0x10000000 - 0x108D1000  C:\Swarm-2.1.1\bin\javaswarm.dll
> > 0x61000000 - 0x6109F000  C:\Swarm-2.1.1\bin\cygwin1.dll
> > 0x60540000 - 0x605AA000  C:\Swarm-2.1.1\bin\BLT24.dll
> > 0x66000000 - 0x66161000  C:\Swarm-2.1.1\bin\cygtcl80.dll
> > 0x66300000 - 0x664EF000  C:\Swarm-2.1.1\bin\cygtk80.dll
> > 0x763B0000 - 0x763F5000  C:\WINDOWS\system32\COMDLG32.DLL
> > 0x772D0000 - 0x77333000  C:\WINDOWS\system32\SHLWAPI.dll
> > 0x77340000 - 0x773CB000  C:\WINDOWS\system32\COMCTL32.dll
> > 0x69800000 - 0x69FEE000  C:\WINDOWS\system32\SHELL32.dll
> > 0x71950000 - 0x71A34000
> >
>
C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0
> > .0.0_x-ww_1382d70a\comctl32.dll
> > 0x71C20000 - 0x71C6F000  C:\WINDOWS\System32\netapi32.dll
> > 0x76F90000 - 0x76FA0000  C:\WINDOWS\System32\Secur32.dll
> > 0x5AD70000 - 0x5ADA4000  C:\WINDOWS\system32\uxtheme.dll
> > 0x63000000 - 0x63014000  C:\WINDOWS\System32\SynTPFcs.dll
> > 0x77C00000 - 0x77C07000  C:\WINDOWS\system32\VERSION.dll
> > 0x76C90000 - 0x76CB2000  C:\WINDOWS\system32\imagehlp.dll
> > 0x6D510000 - 0x6D58C000  C:\WINDOWS\system32\DBGHELP.dll
> > 0x76BF0000 - 0x76BFB000  C:\WINDOWS\System32\PSAPI.DLL
> >
> > Local Time = Mon Aug 12 11:54:54 2002
> > Elapsed Time = 4
> > #
> > # The exception above was detected in native code outside the VM
> > #
> > # Java VM: Java HotSpot(TM) Client VM (1.3.1-b24 mixed mode)
> > #
> > # An error report file has been saved as hs_err_pid1248.log.
> > # Please refer to the file for further information.
> > #
> > Thank's
> > Tiago.
> >
> >
> >
> >                   ==================================
> >    Swarm-Support is for discussion of the technical details of the day
> >    to day usage of Swarm.  For list administration needs (esp.
> >    [un]subscribing), please send a message to <address@hidden>
> >    with "help" in the body of the message.
> >
> >                   ==================================
> >    Swarm-Support is for discussion of the technical details of the day
> >    to day usage of Swarm.  For list administration needs (esp.
> >    [un]subscribing), please send a message to <address@hidden>
> >    with "help" in the body of the message.
> >
> >
>
>                   ==================================
>    Swarm-Support is for discussion of the technical details of the day
>    to day usage of Swarm.  For list administration needs (esp.
>    [un]subscribing), please send a message to <address@hidden>
>    with "help" in the body of the message.
>



                  ==================================
   Swarm-Support is for discussion of the technical details of the day
   to day usage of Swarm.  For list administration needs (esp.
   [un]subscribing), please send a message to <address@hidden>
   with "help" in the body of the message.