Java Programming Tutorials

Java programming tutorials with many code examples!

Java casting trick

Recently I’ve rediscovered Class.cast(object) that can be used to cast objects to a type. In Java 8 streams the method allows to do a nice Java casting trick.

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Java 8 range of numbers

How to generate in Java 8 range of numbers? This is practical problem, often met when writing tests. In this post we’ll cover fast implementation, comfortable, and flexible with Java 8 Streams!

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Java int to String

In Java int to String conversion can be done in a different ways and converted String can be in different formats. In this post we’ll show on examples how to convert them.

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Java String to int

In Java String to int conversion can be done in a few different ways. In this post we’ll show them and describe differences.

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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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Java unchecked warnings

Java unchecked warnings

In this tutorial we’re going to show how to eliminate unchecked warnings that occur frequently when mixing Java Generics with legacy code.

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Java Initialization order

Java Initialization order

In this tutorial we’re going to show what is initialization order of fields (instance and static) in Java when JVM loads a class.

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Java Properties load from XML

Problem:

How to load Properties in Java? Properties class has methods to load properties from different sources – InputStream, Reader, and XML file. Here’s an example of Properties.loadFromXML(InputStream).

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Java Properties load

Problem:

How to load Properties in Java? Properties class has methods to load properties from different sources – InputStream, Reader, and XML file. Here’s an example of Properties.load(InputStream).

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