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Sven Woltmann
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bubble sort java feature image
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Bubble Sort – Algorithm, Source Code, Time Complexity

Sven WoltmannSven WoltmannJuly 8, 2020
In this article, I describe how Bubble Sort works, introduce the source code, and explain how to derive its time complexity.
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selection sort java feature image
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Selection Sort – Algorithm, Source Code, Time Complexity

Sven WoltmannSven WoltmannJune 25, 2020
In this article, I describe how Selection Sort works, show its source code, and explain its derivation of time complexity.
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insertion sort java feature image
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Insertion Sort – Algorithm, Source Code, Time Complexity

Sven WoltmannSven WoltmannJune 11, 2020
This article describes how Insertion Sort works, shows an implementation in Java and explains the time complexity.
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sorting in java feature image
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Sorting in Java
[Tutorial]

Sven WoltmannSven WoltmannJune 11, 2020
This tutorial explains – step by step and with many code examples – how to sort primitive data types (ints, longs, doubles, etc.) and objects of any class in Java.
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sorting algorithms java feature image
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Sorting Algorithms
[Ultimate Guide]

Sven WoltmannSven WoltmannJune 11, 2020
If you need a refresher on how the most common sorting algorithms work and how they differ, this series is for you.
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Big O notation and time complexity – easily explained – feature image-o-notation-time-complexity-easily-explainedBig O Notation and Time Complexity – Easily Explained
Sven WoltmannSven WoltmannMay 28, 2020
In this article, I will explain the big O notation (and the time and space complexity described with it) only using examples and diagrams – and entirely without mathematical formulas, proofs and symbols like θ, Ω, ω, ∈, ∀, ∃ and ε.
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Stack, Queue, Deque - Feature Image
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Stack, Queue, Deque in Java

Sven WoltmannSven WoltmannApril 8, 2020
How do the stack, queue and deque data structures work? Which implementations are available in the JDK? Which one should you use when?
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java deep reflection
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Java Deep Reflection: How to Hack Integer and String

Sven WoltmannSven WoltmannMarch 11, 2020
Can 2+3 = 6?In this article, I show you how Deep Reflection can be used to change the values of Integers and Strings at runtime.
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java byte buffer flip compact
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Java ByteBuffer Example: How to Use flip()
and compact()

Sven WoltmannSven WoltmannFebruary 26, 2020
In this article, I show you (using an example) how the Java ByteBuffer works, and what precisely the Methoden flip() and compact() do.
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java file channel
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FileChannel, Memory-Mapped I/O, Locks
(Java Files Tutorial)

Sven WoltmannSven WoltmannFebruary 26, 2020
In this article, you will learn everything about the NIO classes FileChannel and ByteBuffer introduced in Java 1.4.You'll learn about their capabilities for reading and writing files and their advantages over the previously discussed methods.
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