1. import java.util.HashMap;
  2. import java.util.Map;
  4. public class StringCacheInvalidator {
  6. private static final Map<String, String> cache = new HashMap<>(); // Simple string cache
  8. /**
  9. * Invalidates the cache for a given key.
  10. *
  11. * @param key The key of the string to invalidate.
  12. */
  13. public static void invalidateCache(String key) {
  14. cache.remove(key); // Remove the entry with the given key
  15. }
  17. /**
  18. * Clears the entire cache.
  19. */
  20. public static void clearCache() {
  21. cache.clear(); // Remove all entries from the cache
  22. }
  24. public static void main(String[] args) {
  25. //Example Usage
  26. cache.put("key1", "value1");
  27. cache.put("key2", "value2");
  29. System.out.println("Cache before invalidation: " + cache);
  31. invalidateCache("key1");
  32. System.out.println("Cache after invalidating key1: " + cache);
  34. clearCache();
  35. System.out.println("Cache after clearing: " + cache);
  36. }
  37. }

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