As Java developers, we spend a lot of time writing code. But writing code that works is only half the job.

The real challenge is writing code that another developer can understand, modify, and maintain six months from now — including you.

Over time, I've found that small coding habits can make a significant difference in the quality of a Java application.

Here are five habits worth building.

1. Write Methods That Do One Thing

A method that validates input, saves data, sends an email, and writes logs is doing too much.

Consider this example:

public void registerUser ( User user ) { validateUser ( user ); userRepository . save ( user ); emailService . sendWelcomeEmail ( user ); logger . info ( "User registered: {}" , user .…