Solved

file.write...IndexOutOfBoundsException

Posted on 2002-04-25
2
767 Views
Last Modified: 2008-03-06
What is causing the exception to be thrown and how do I fix it?

public static void main(String[] args)
{
  try
  {
  FileOutputStream file = new FileOutputStream ("testfile.txt");
  byte[] buffer = "this is string 1".getBytes();  // convert String to byte[]
  int offset = 0;
       
  file.write(buffer,             // buffer
             offset,            // offset
             buffer.length);  // length

   offset += buffer.length;  // add length of what we just wrote to offset

   buffer = "this is string 2".getBytes();  // convert String to byte[]

   System.out.println ("Everything OK so far...");
       
   file.write(buffer,             // buffer
              offset,            // offset
              buffer.length);  // length
   }
   catch (Exception e)
   {
   // throws java.lang.IndexOutOfBoundsException
   System.out.println("Exception: " + e.toString());
   }
}
0
Comment
Question by:jdaues
  • 2
2 Comments
 
LVL 18

Expert Comment

by:bobbit31
ID: 6968775
in your second file write,

offset is the length of the first buffer.

if this + the length of the second buffer is greater than the length of the second buffer, then it'll throw that error.

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException
Writes len bytes from the specified byte array starting at offset off to this file output stream.

0
 
LVL 18

Accepted Solution

by:
bobbit31 earned 50 total points
ID: 6968788
if you just want to put string1 and string2 together:

byte[] buffer = "this is string 1".getBytes();  // convert String to byte[]
 
file.write(buffer);

buffer = "this is string 2".getBytes();  // convert String to byte[]

file.write(buffer);
 

0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
numbers ascending pyramid 101 236
Maven Project: Hibernate Dependencies Conflict 10 49
mysql jsp example issue 32 70
Eclipse with various Java releases 7 45
INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
The viewer will learn how to implement Singleton Design Pattern in Java.
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question