1. import java.util.ArrayList;
  2. import java.util.List;
  4. public class URLPaginator {
  6. private final List<String> urls;
  7. private final int pageSize;
  8. private int currentPage;
  10. public URLPaginator(List<String> urls, int pageSize) {
  11. this.urls = urls;
  12. this.pageSize = pageSize;
  13. this.currentPage = 1;
  14. }
  16. public List<String> getPage() {
  17. if (urls == null || urls.isEmpty()) {
  18. return new ArrayList<>(); // Return empty list if no URLs
  19. }
  21. int startIndex = (currentPage - 1) * pageSize;
  22. int endIndex = Math.min(startIndex + pageSize, urls.size()); //Prevent index out of bounds
  24. List<String> page = new ArrayList<>();
  25. for (int i = startIndex; i < endIndex; i++) {
  26. page.add(urls.get(i));
  27. }
  28. return page;
  29. }
  31. public int getCurrentPage() {
  32. return currentPage;
  33. }
  35. public int getPageSize() {
  36. return pageSize;
  37. }
  39. public int getTotalPages() {
  40. return (int) Math.ceil((double) urls.size() / pageSize);
  41. }
  43. public void nextPage() {
  44. currentPage++;
  45. }
  47. public void previousPage() {
  48. currentPage--;
  49. if (currentPage < 1) {
  50. currentPage = 1;
  51. }
  52. }
  54. public static void main(String[] args) {
  55. // Example Usage
  56. List<String> urls = new ArrayList<>();
  57. for (int i = 1; i <= 25; i++) {
  58. urls.add("http://example.com/page" + i);
  59. }
  61. URLPaginator paginator = new URLPaginator(urls, 5);
  63. //Dry-run mode - just print pages, don't modify state
  64. for (int i = 1; i <= 3; i++) {
  65. List<String> page = paginator.getPage();
  66. System.out.println("Page " + i + ": " + page);
  67. }
  68. }
  69. }

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