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Modern Java: new versions & features, performance, and JVM insights – tutorials and deep dives, clearly explained and directly applicable.
Java 18 Features (with Examples)
March 22, 2022Java 18 features with examples: UTF-8 by default, jwebserver, the @snippet tag in JavaDoc, Internet-Address Resolution SPI, and more.
Reverse a Stack Using Recursion (Insert at Bottom)
March 16, 2022How to reverse a stack using recursion, no loop: reverse() and insertAtBottom() step by step – with diagrams, Java code, and running time.
Implement a Stack Using Queues
March 16, 2022Implement a stack using two queues – or a single one: step by step with diagrams, Java code, and the running times of push() and pop().
Implement a Stack Using a Linked List in Java
March 16, 2022Implement a stack using a singly linked list in Java: push and pop step by step, with diagrams, source code and a comparison with arrays.
Implement a Stack Using an Array in Java
March 16, 2022Implementing a stack in Java with an array, without Collections classes: first with a fixed size, then with an array that grows on demand.
Java Stack: Class, Methods, Alternatives, and Implementation
March 16, 2022The Java Stack class by example, why ArrayDeque is better – and how to implement your own stack with push(), pop(), peek(), and isEmpty().
Stack Data Structure: LIFO Principle, Push, Pop, Peek
March 16, 2022The stack data structure explained: the LIFO principle, push, pop, and peek, typical applications, and time complexity.
Java Switch Expressions (JEP 361): Arrows, yield, No break
February 2, 2022Switch expressions since Java 14 (JEP 361): arrow cases without break, values via yield, exhaustiveness for enums – and what Java 21 added.
Generating Random Numbers in Java – and Predicting Them
January 31, 2022Random numbers in Java: Math.random(), Random, ThreadLocalRandom, and SecureRandom – and why pseudorandom numbers can be predicted.
Java Text Blocks: Multiline Strings with Triple Quotes (JEP 378)
January 19, 2022Text blocks: multiline strings in Java without \n. How to write and indent them, and which two new escape sequences you get.Want Even More Knowledge?
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