Java: How to Get the File Path Separator
Keep 'em separated.
Java NIO: How to Format FileTime
Make it look pretty.
Java NIO: How to Get the Last Modified Time From a File
Find out when it happened.
Java: How to Format a Double With DecimalFormat
When you don't need too much precision.
Java: How to Format a Double Using String.format()
Make it look the way it should.
Spring Boot: How to Upload Files With a REST API
It's just a glorified request body.
JUnit and Mockito: Why Your Mocks Aren't Injecting
One theory, anyway.
JUnit: Test Exception Conditions With assertThrows()
Make sure things go wrong the way they're supposed to go wrong.
Spring Boot: How to Handle REST API Errors
Take the time to deliver a user-friendly error response.
So What's the Difference Between ? and Object in Java Generics?
They're not the same.