Learn multiple approaches to converting an int[] to a HashSet in Java.

Learn how to use Java's Iterator and ListIterator and explore the key differences between them.

Learn how to get the first item from a Java Set.

A quick and practical guide to converting String or String Array to Map in Java.

We previously built a Java application on a Neo4j graph database. Now we can take this further by exploring custom queries and projections.

JVM computed constants, safepoints, Maven vs Gradle battle, GC improvements, bulk SQL, and effective technology strategies. A good week.

Java's new yield keyword makes it easier to provide a returned result from switch statements. We look at how it works and how it can help ensure we cover all possible cases.

Learn two different ways to convert time from the 12-hour time format to the 24-hour time format in Java.

A quick but comprehensive explanation of why there's no SortedList in Java.

A quick and practical guide to HashMap with multiple values per key.

Discover the differences between the String.valueOf() and Object.toString() methods.

Learn different approaches to convert a Java String ArrayList to a String array through examples.

A quick and practical guide to sorting Java Map in descending order.

A quick and practical guide to Avaje Inject.

Learn how the Holder class can serve as a flexible and powerful tool for various programming scenarios in Java.

A quick and practical guide to converting List to Long[] Array in Java.

Learn multiple ways to check whether a Java String is valid JSON.

Use the Guava CharMatcher to work with Strings - remove special chars, validate, trim, collapse, replace and count among other super useful APIs.

Learn how to find the longest words in a sentence.

Learn how we to easily create permutations in Java using third-party libraries.