Updating a hashmap
If you have Maven and Eclipse plugin installed, instead create a Maven Java project, this will also help you to download Apache POI Jar files.format in Java, which is key to support old Microsoft Excel files created using Microsoft Office version prior to 2007.Since JDK doesn't provide direct API to read and write Microsoft Excel and Word document, you have to rely on third party library to do your job. Fortunately Apache POI supports both format, and you can easily create, read, write and update Excel files using this library.Fortunately there are couple of open source library exists to read and write Microsoft Office using Apache POI online, which means you will never feel alone and has instant Google support if you stuck there. It uses terms like workbook, worksheet, cell, row to keep itself aligned with Microsoft Excel and that's why it is very easy to use.
Given they are two different format, some features will not be available on XLS file processors but all basic stuff remain same. instead of using Here is our full Java program to read/write from existing Excel file in Java.This made them error prone and thus a notorious hunting ground for "buffer overrun" security vulnerabilities which enable hackers to gain elevated access to the hacked system.C# supports arrays as a definite, distinct reference type (objects of a class with methods and properties), so out-of-bounds errors will result in an error that error handling routines can respond to specifically.Though there are couple of other alternative libraries to read Excel files from Java program, but Apache POI is the best one and you should use it whenever possible.Let me know if you face any problem while running this program in your Eclipse IDE or from command prompt.