⚔️ Free Arena Battle
Beginner Challenge
Simple algorithms — perfect for warming up!
- ✓ Simple algorithms
- ✓ Basic data structures
- ✓ 20 min time limit
Advanced Challenge
Intermediate problems to sharpen your skills!
- ✓ Advanced algorithms
- ✓ Complex data structures
- ✓ 25 min time limit
Elite Challenge
Expert-level challenges — test your limits!
- ✓ Expert algorithms
- ✓ Advanced data structures
- ✓ 30 min time limit
Bug Hunt
Beginner Bug Hunt
Fix simple bugs — no pressure!
- ✓ Simple syntax errors
- ✓ Off-by-one errors
- ✓ 5 min time limit
Advanced Bug Hunt
Fix logic errors — no risk!
- ✓ Logic errors
- ✓ Algorithm bugs
- ✓ 7 min time limit
Elite Bug Hunt
Fix expert bugs — pure skill!
- ✓ Complex bugs
- ✓ Multiple issues
- ✓ 10 min time limit
💰 Get Paid Arena Battles
Beginner Challenge
10
Perfect for Java beginners. Easy problems to get you started!
- ✓ Simple algorithms
- ✓ Basic data structures
- ✓ Quick solutions
Advanced Challenge
30
For experienced Java coders. Complex problems with higher stakes!
- ✓ Advanced algorithms
- ✓ Complex data structures
- ✓ Higher rewards
Elite Challenge
50
The ultimate test! Master-level Java problems with maximum rewards!
- ✓ Expert algorithms
- ✓ Advanced data structures
- ✓ Maximum rewards
🐛 Java Debug Battle
Fix the buggy Java code before your opponent does!
🐛 Beginner Debug
10
Fix simple bugs in Java code!
- ✓ Simple syntax errors
- ✓ Off-by-one errors
- ✓ 2 minutes time limit
🐛 Advanced Debug
30
Fix complex logic errors!
- ✓ Logic errors
- ✓ Algorithm bugs
- ✓ 2 minutes time limit
🐛 Elite Debug
50
Fix expert-level bugs!
- ✓ Complex bugs
- ✓ Multiple issues
- ✓ 2 minutes time limit
🤔 Why Java Battle?
Pure Java
Write real Java code with full JDK support
Real-time Competition
Battle against other Java developers live
Earn Points
Win battles and climb the leaderboard
Learn & Improve
Practice Java algorithms and data structures