Example: str = "aabcccccaaa" → Compressed string = "a2b1c5a3" Find if a string is a substring of another string: Check if a string is a substring of another string. Example: str1 = "abc", str2 = "abcd ...

In this tutorial, you’ll learn about generics and see three examples of using them with the Java Collections Framework.

When we use the "Windows-MY" Keystore, it is possible to see the certficates without a problem. When you want to decrypt an S/MIME, you see `java.security.ProviderException: java.security.KeyException ...

This guide provides step-by-step instructions with examples how to extract a substring in Excel using various text functions.

Which version of Java should you use in Linux? Learn how to easily switch between different versions with a tutorial from Jack Wallen.

Learn how to use synchronous and asynchronous callbacks in Java—including callbacks with lambda expressions, CompletableFuture, and more.

If you haven't used Java's JShell yet, you're missing out. Here's a quick Java and JShell tutorial to get you started.

Peter Lawrey discusses Unsafe in Java 8, Project Panama in Java 17 and Java 19, including pactical uses with code examples, demo using Panama, Event Sourcing using shared memory with Chronicle Queue.

Need to disassemble a Java class file? Want to look at the bytecode instructions generated from compiling source? These javap tool examples will show you how to use the javap command properly.