Win a copy of The Journey To Enterprise Agility this week in the Agile and Other Processes forum! And see the welcome thread for 20% off.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Jeanne Boyarsky
  • Liutauras Vilda
  • Campbell Ritchie
  • Tim Cooke
  • Bear Bibeault
Sheriffs:
  • Paul Clapham
  • Junilu Lacar
  • Knute Snortum
Saloon Keepers:
  • Ron McLeod
  • Ganesh Patekar
  • Tim Moores
  • Pete Letkeman
  • Stephan van Hulst
Bartenders:
  • Carey Brown
  • Tim Holloway
  • Joe Ess

matrix array  RSS feed

 
Ranch Hand
Posts: 31
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
hi all,
i have defined a class "matrix" by my self, i wanna have an array of matrix, the code is in the following:
....
matrix[][] m=new matrix[20][15];
for(int i=0;i<20;i++)
for(int j=0;j<20;j++)
m[i][j] = new matrix();
....
class matrix
{
public int type;
public int NodeNo;
public matrix()
{
type=0;
NodeNo =0;
}
void settype(int t)
{
type =t;
}
void setNodeNo(int n)
{
NodeNo =n;
}
}
Problem : there's no compiling error, but there will be arrayIndexOutOfBoundsException ....
Anybody can help me?
thanks
dejie
 
Ranch Hand
Posts: 375
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi Dejie,
j will max out at 14 so j < 20 is gonna throw an exception, it should read j < 15.
A better approach would be -

I don't think I have got this wrong, but do check, no JVM on this machine.
HTH
Ashish Hareet
 
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!