Java Programming Tutorials

Java programming tutorials with many code examples!

Java Reverse String in 2 ways

Java Reverse String in 2 ways

Java String doesn’t have reverse method, so it may not be immediately apparent how to reverse a string in Java. Here are two ways do do it.

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Insertion Sort in Java

Insertion Sort in Java

Insertion Sort is another simple to understand and implement algorithm. Unlike Selection Sort it can work faster with certain data.

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Selection Sort in Java

Selection Sort in Java

Selection Sort is one of many sorting algorithms, but unlike a few others it is easy to understand and implement as we’re going to show here!

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Clojure for loop

Clojure for loop

The for loop in Clojure looks quite different than in most common languages. Here we’re going to show how to do some crazy things with it and how it relates to Java versions.

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Java Util Optional map(Function)

java.util.Optional.map(Function)

The method Optional.map(Function) applies the given function to the optional value if it is present and returns an optional with the result or empty optional.

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Java Util Optional.ofNullable(T)

java.util.Optional.ofNullable(T)

The method Optional.ofNullable(T) returns Optional containing given value if it was not null or an empty Optional in case of null value.

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