1. import java.util.HashMap;
  2. import java.util.Map;
  4. public class URLParameterMonitor {
  6. private Map<String, String> currentParams = new HashMap<>();
  8. public void addParameter(String key, String value) {
  9. currentParams.put(key, value);
  10. }
  12. public String getParameter(String key) {
  13. return currentParams.getOrDefault(key, null); // Return null if key not found
  14. }
  16. public void removeParameter(String key) {
  17. currentParams.remove(key);
  18. }
  20. public Map<String, String> getCurrentParams() {
  21. return new HashMap<>(currentParams); // Return a copy to prevent external modification
  22. }
  24. public static void main(String[] args) {
  25. URLParameterMonitor monitor = new URLParameterMonitor();
  27. // Example usage:
  28. monitor.addParameter("name", "John Doe");
  29. monitor.addParameter("age", "30");
  31. System.out.println("Name: " + monitor.getParameter("name")); // Output: John Doe
  32. System.out.println("Age: " + monitor.getParameter("age")); // Output: 30
  33. System.out.println("City: " + monitor.getParameter("city")); // Output: null
  35. monitor.removeParameter("age");
  36. System.out.println("Age after removal: " + monitor.getParameter("age")); // Output: null
  38. Map<String, String> params = monitor.getCurrentParams();
  39. System.out.println("Current parameters: " + params);
  40. }
  41. }

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