Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...

Community driven content discussing all aspects of software development from DevOps to design patterns. Follow these steps to find the length of a String in Java: Declare a variable of type String ...

Instance main methods and unnamed classes, coming in Java 21, will forever change how developers learn Java and bootstrap applications. Why? They provide a simple, clean and concise syntax to launch ...

Method references are a shorthand way to write lambda expressions that call a single method. Rather than implementing a method in a functional interface, a method reference simply points to an ...

In January, 1923, Lee Strasberg went to Al Jolson’s 59th Street Theatre to see “Tsar Fyodor Ivanovich,” a nineteenth-century Russian play about sixteenth-century Russian politics, performed, in ...

Wim Hof is an athlete and motivational speaker who has proposed that cold exposure combined with periods of hyperventilation and breath-holding can improve health and well-being. The method involves ...

On her third album, the UK singer-songwriter sounds relaxed, confident, unflappably cool, even in moments of conflict. The result is an album of everyday luxury, lush and unhurried. She’s not without ...

The number pi (π) appears in the most unlikely places. It can be found in circles, of course—as well as in pendulums, springs and river bends. This everyday number is linked to transcendental ...

Reflection was essential to the advanced Java toolkit for years. Now it's being superseded by newer, safer options. Here's how to use MethodHandle and VarHandle to gain programmatic access to methods ...