Java FAQ: Top Questions

ConcurrentHashMap in java.util.concurrent is a thread-safe implementation of the Map interface, designed for concurrent access without full locking.

• Segmented Locking: Divides the map into segments, allowing concurrent reads and writes to different segments.
• Thread Safety: Operations like put , get are safe without external synchronization.
• Performance: Higher throughput than Collections.synchronizedMap .
• Null Handling: Does not allow null keys or values.
• Use Case: Multithreaded applications with shared key-value stores.