Learn how to use synchronous and asynchronous callbacks in Java—including callbacks with lambda expressions, CompletableFuture, and more.

To use Java printf to format double and float values with decimal place precision, follow these two rules: Use %f as the double specifier in the text string. Precede the letter f with a decimal and ...

The functional consumer interface is a key part of the Java Streams API. Here is a simple Consumer interface example to show you how to use this Java component.

An appeals court rules that Google violated Oracle's copyright when it built a version of Java for the Android operating system, in the latest twist in an 8-year saga.