John Selawsky Senior Java Developer and Tutor at LearningTree
A senior Java developer and Java tutor at Learning Tree International programming courses. Sometimes I write some stupid programming stuff about Java.
7 years experience of Java/J2EE development. In Java We Trust.
Author's articles
- February 19, 2025 at 3:16 PMJava.lang.Integer ClassJava data types can be conditionally divided into two blocks: primitive and reference (classes). There are several primitive data types in Java, such as integers (byte, short, int, long), floating point numbers (float, double), logical data...
2/19/25 3167views 1comment
2 - January 12, 2025 at 2:09 PMIF ELSE Java StatementsAn if else statement in Java is a conditional statement. Java uses conditions just like mathematics, allowing comparisons that yield Boolean results. So you can test inputs to see how they compare to a static set of values that you specify. Because the result is Boolean, there are only two possible results...
1/12/25 17743views 0comments
13 - January 9, 2025 at 9:00 AMBubble Sort JavaIn this article the bubble sort algorithm is described. It is the easiest sorting algorithm to learn, so every software developer knows it. This algorithm is usually used for learning purposes or you may get it as a task in your Java Junior Interview. Bubble sort algorithm is very easy to understand, however it is not...
1/9/25 14502views 0comments
25 - January 1, 2025 at 12:04 PMJava String contains() MethodThis function is specially designed to check if a string ‘contains’ another string or not. If you’re new to this you might end up using it to find a ‘character’. But it won’t serve the purpose. In this article, we’ll address how java.lang.String.contains() is used, implemented...
1/1/25 5235views 0comments
4 - December 23, 2024 at 12:53 PMJava String replace() MethodWhat are the common replace() methods of String class in Java? The String class provides four different kinds of replace() methods in Java. Each of the methods addresses a specific use case. Their names are listed below...
12/23/24 3900views 0comments
4 - December 2, 2024 at 10:22 PMJunior → Senior. How Many Years Do You Need to Become a Senior Java DeveloperAs you may know by now, traditionally in the tech industry developers are divided into four gradations based on their qualification levels: Junior, Middle, Senior and Team Lead. Or five, if you include coding Interns as the lowest-ranked...
12/2/24 10777views 2comments
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