Java Strategy for Splendor Marvel

I need a Java implementation of a player decision-making strategy for the game Splendor Marvel. This is for a school assignment. I have already done a code but it doesn't work so I need help because I'm blocked.

The strategy should focus on:
- Card selection strategy
- Resource allocation strategy
- Opponent interaction strategy

Key requirements:
- Balance between short-term and long-term benefits
- Adapt based on opponent's actions

Ideal skills and experience:
- Proficiency in Java
- Experience with game theory and strategy development
- Understanding of Splendor Marvel rules and mechanics