Java 101

Complete your introduction to the Regex API, then find out how regular expressions make quicker work of common tasks like code documentation and lexical analysis.

Pattern matching is an important technique used in text processing, and Regex is here to help. Find out how to use the Pattern class and constructs like quantifiers and boundary matchers to describe patterns in your Java programs.

Extracting class interfaces into Java interfaces can increase the reusability of your code, but only if you know how to use their special properties.

This final installment in the "Java 101: Foundations" series introduces all of Java's features for initializing classes and objects.

Learn how to use subtype polymorphism to execute different forms of the same Java method

Get to know the ultimate superclass of Java's class inheritance hierarchy: java.lang.Object.

Learn the basics and more of Java inheritance, one of the fundamental concepts of object-oriented programming. Get your head around inheritance concepts and syntax, then go hands-on with the mothership of all Java classes:...

Learn how to make classes, fields, methods, constructors, and objects work together in your Java applications.

Learn how to use statements like if, if-else, switch, and while to specify expressions, make decisions, and iterate in your Java programs.

Continue learning the fundamentals of Java programming, with this Java 101 introduction to using operators to write compound Java expressions.

Learn three ways to document your code and find out why Unicode is the universal encoding standard for Java, then practice using identifiers, types, literals, and variables in your Java programs. All examples are written in Java 8.

If you're new to Java then you've come to the right place: Get started with the foundations of the Java platform and code your first Java application with this classic tutorial for beginners.

End your tour of Java's essential language features with Java 8's method references, interface default and static methods, and three lesser known language updates, then preview new features coming in Java 9.

Learn by example how lambdas interact with scopes, local variables, the this and super keywords, and exceptions in Java programs.

Not all varargs methods will contribute to heap pollution, so find out which ones do and why, in this second half of Jeff Friesen's introduction to small language changes that have made a big difference since JDK 7.

Project Coin was the Java 7 language update that emphasized small changes with a big impact. Get a primer on automatic resource management with try-with-resources, then zip through three more JDK 7 updates: switch-on-string,...

Get introduced to the last but not least of new features that have improved Java's productivity since JDK 5: Autoboxing and unboxing, the enhanced for loop, static imports, varargs, and covariant return types.

Learn how to use typesafe enums in switch statements, then get started with Java annotations and meta-annotations types like Target, which can clarify the meaning of annotations in your Java code.

From assertions in JDK 1.4 to the forthcoming lambdas in Java 8, the Java language has evolved considerably since its inception. Start building your toolbox of essential Java language features this week, with assertions and generics.

Learn how the Java Concurrency Utilities handle locking, atomic variables, and fork/join operations. Then prepare for the future with an overview of anticipated changes to the Java Concurrency Utilities coming in Java 8.