Java Programming Tutorials

Java programming tutorials with many code examples!

Java CyclicBarrier – game simulation

Java CyclicBarrier is very convenient synchronization tool for writing concurrent simulations. In this post we’ll show how it works and write a game simulation.

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SLF4J: Class path contains multiple SLF4J bindings

SLF4J: Class path contains multiple SLF4J bindings error occurs in many projects, especially those having multiple dependencies. Here we the reason and how to deal with it!

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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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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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Java Util Map replaceAll(BiFunction)

java.util.Map.replaceAll(BiFunction)

The method Map.replaceAll(BiFunction) replaces each value with the result of applying the given function on the corresponding entry. Rethrows exceptions thrown by the replacement function.

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