[RESOLVED] RandomAccessFile

[kolt007]

With this.

public static void main(String[] args) throws IOException {
  
  String s = "hello world";
  byte[] sT = {'h','i'};
  Path path = FileSystems.getDefault().getPath

("D:/Users/Kolton/Desktop/codebreaker/learn/Learnpath/Test2.txt"); 

  try 
   (RandomAccessFile rA = new RandomAccessFile(file, "rw")) {
  rA.write(sT, 1, 2);
       } 
      }
     }

I get this error

Exception in thread "main" java.lang.IndexOutOfBoundsException
        at java.io.RandomAccessFile.writeBytes(Native Method)
        at java.io.RandomAccessFile.write(RandomAccessFile.java:499)
        at Test.main(Test.java:103)
Press any key to continue . . .

[keang]

If the file is empty the offset needs to be 0.

[kolt007]

The file isn't empty

[AF444]

Such an error (IndexOutOfBounds) usually means that at some point in your code, typically in a loop, you exceed the maximum number of elements in an array or another constant size data structure. In your case, I guess the error occurs because you are trying to copy 2 characters from an array that contains only 2 elements, and you start from the second element in that array, which means you are trying to copy a third element, which doesn't exist.

Hope that helps.

[kolt007]

Edit