Problem on StringBuffer.append(String.charAt(int)) in jdk1.5

StringBuffer.append(String.charAt(int)) is worked fine in jdk1.3 I migrated my code jdk1.3 to 1.5. Now its throwing unreported exception on above lineHow to resolve it?Problem on StringBuffer.append(String.charAt(int)) in jdk1.5
[256 byte] By [jagadeshrajua] at [2007-11-26 23:02:18]
# 1
> Now its throwing unreported exception What about posting the Exception class, message and stack trace ?Could it be that the Exception is thrown by charAt (e.g. an IndexOutOfBoundsException because the index is not less than the length of the string) ?
TimTheEnchantora at 2007-7-10 13:27:40 > top of Java-index,Java Essentials,New To Java...