1. import java.util.ArrayList;
  2. import java.util.HashMap;
  3. import java.util.List;
  4. import java.util.Map;
  6. class MonitoringStructure {
  8. private List<List<Object>> data; // Nested array structure
  9. private Map<String, Object> metadata; // Metadata associated with the structure
  11. public MonitoringStructure() {
  12. data = new ArrayList<>();
  13. metadata = new HashMap<>();
  14. }
  16. public void addData(List<Object> row) {
  17. data.add(row);
  18. }
  20. public Object getData(int row, int col) {
  21. if (row >= 0 && row < data.size() && col >= 0 && col < data.get(row).size()) {
  22. return data.get(row).get(col);
  23. }
  24. return null; // Fallback: Return null if index is out of bounds.
  25. }
  27. public Map<String, Object> getMetadata() {
  28. return metadata;
  29. }
  31. public void setMetadata(Map<String, Object> metadata) {
  32. this.metadata = metadata;
  33. }
  34. }
  36. public class ArrayMonitor {
  38. public static MonitoringStructure createStructure() {
  39. return new MonitoringStructure();
  40. }
  42. public static void main(String[] args) {
  43. MonitoringStructure structure = createStructure();
  45. // Add some data
  46. List<Object> row1 = new ArrayList<>();
  47. row1.add(1);
  48. row1.add("A");
  49. row1.add(10.5);
  50. structure.addData(row1);
  52. List<Object> row2 = new ArrayList<>();
  53. row2.add(2);
  54. row2.add("B");
  55. row2.add(20.0);
  56. structure.addData(row2);
  58. // Access data
  59. Object value = structure.getData(0, 1); // Accessing row 0, column 1
  60. if (value != null) {
  61. System.out.println("Value at row 0, column 1: " + value);
  62. } else {
  63. System.out.println("Index out of bounds.");
  64. }
  66. // Access metadata
  67. Map<String, Object> metadata = structure.getMetadata();
  68. System.out.println("Metadata: " + metadata);
  70. // Example of fallback: accessing out-of-bounds index
  71. Object outOfBounds = structure.getData(1, 5);
  72. if (outOfBounds != null) {
  73. System.out.println("Value at row 1, column 5: " + outOfBounds);
  74. } else {
  75. System.out.println("Index out of bounds.");
  76. }
  78. structure.setMetadata(new HashMap<>());
  79. System.out.println("Updated Metadata: " + structure.getMetadata());
  80. }
  81. }

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