[Java] Are you using them without thinking? Correct usage and characteristics of List, Set, and Map

Are you just using ArrayList whenever you need to group data?What are the specific scenarios where Set or Map are the correct ...
GitHub

Java Collections Handbook

A runnable, interview-focused reference for the Java Collections Framework (Java 17+). Each major collection has its own Java file. Examples demonstrate commonly used methods, and comments explain the ...

10 Common Pitfalls in Java Silver: Lessons Learned from Creating 100 Practice Questions

I created 100 practice questions for the Java Silver exam and verified the answers by actually running the code for every question on both JDK 11 and JDK 17. Along the way, I compiled 10 points where ...
WBUR

25 at 250: Objects that tell America's story, from stamps to diamonds

It’s been 250 years since the signing of the Declaration of Independence — a milestone that invites not just celebration, but reflection. To illustrate two and a half centuries of U.S. history, Here & ...
TheServerSide

7 benefits of Java

Can you explain object-oriented programming to me like I'm 5 years old? Probably not. But here's a straightforward explanation of what OOP is ... Use Spring MVC MultipartFile, Java Path APIs and the ...
The University of Chicago Chronicle

Scientists create ‘odd’ objects that adapt and move over obstacles

Locomotion, the ability to move from one place to another, is an essential survival strategy for virtually every organism. Adapting to the unpredictable terrain they run into, cells, fungi and ...
CNN

Why do some people give human feelings to inanimate objects? What experts say

When she goes to the grocery store, Lilianna Wilde will sometimes go for the shopping cart from which everyone else steers clear, the sad-looking one with the squeaky wheel. When she puts the dishes ...
InfoWorld

OpenJDK proposal would bring value classes and objects to Java

An OpenJDK proposal would preview value classes and objects in a forthcoming version of Java. The feature would provide Java class instances that have only final fields and lack object identity. The ...
InfoWorld

Shallow and deep copy: Two ways to copy objects in Java

Copying objects is a common Java programming operation that has one serious trap. Here's how to avoid copying from an object reference and only copy the instance and values you want. Copying objects ...
Astronomy

101 Weirdest Cosmic Objects

Two years ago, our special January issue brought forth a popular package, 101 Must-See Cosmic Objects. Now we follow it up in a very different direction. My thought this time was to produce something ...
Astronomy

Hoag’s Object

In the October 1950 issue of The Astronomical Journal, American astronomer Arthur Hoag states that the object “appears to be a perfectly symmetrical planetary nebula.” However, he acknowledged that ...