In this article, we learn how to calculate month intervals between dates in Java.

A quick look at how to set the JAVA_HOME variable on Windows, Mac OS X, and Linux.

A quick tutorial on working with Excel files in Java using Apache POI and JExcel.

Learn how to use Drools as a Business Rule Management System (BRMS).

A quick and practical guide to inter-process communication in Java.

Learn how character encoding works and explore why String.length() and String.getBytes().length can produce different results.

Learn how to use the -XX:MaxRAM flag to provide more tuning opportunities for the heap size calculation.

Explore three approaches to removing characters from one string if they're present in another.

Learn how to convert Excel files to PDF in Java using the Apache POI and iText libraries.

In this tutorial, we learn how to convert a String to a long primitive or Long object.

Learn multiple approaches to finding a single missing number from an array in the integer range [1-N].

Learn how to use the Java standard API and a third-party API to create a table using ASCII characters in Java.

Learn how comments and Unicode escape sequences work together.

Learn different ways of getting information about a PDF file using the iText and PDFBox libraries in Java.

Learn how to modify the font style of cells in a Microsoft Excel document

Learn how to change the cell background color in Excel using Apache POI.

Learn how to use Apache POI to lock header rows in Excel spreadsheets

Learn how to quickly check if List contains at least one enum value

Learn how to add multiline text to a cell using Apache POI.

A quick and practical guide to PDF conversions in Java