Advent Of Code 2025 in Java

Instructions

For a next day N:

1. Go to src/main/resources
2. Copy Day0_sample.txt to DayN_sample.txt and place puzzle input sample there
3. Copy Day0.txt to DayN.txt and place your puzzle input there
4. Go to src/main/java
5. Copy Day0.java to DayN.java
6. Solve the puzzle and add the day to AllDaysRunner
7. Have fun and may the ⭐ be with you!

Note

• This template is a Maven project with zero dependencies to keep it simple.
• All task input files (src/main/resources) are excluded from the repository with .gitignore – we should not post them publicly, as Eric Wastl asks for: Tweet.