1. import java.util.Arrays;
  2. import java.util.ArrayList;
  3. import java.util.List;
  5. public class ArrayEncoder {
  7. /**
  8. * Encodes an array to a string representation suitable for backward compatibility.
  9. * Uses a simple format: "[element1,element2,element3,...]"
  10. *
  11. * @param array The array to encode.
  12. * @return The encoded string representation of the array. Returns "[]" for null or empty arrays.
  13. */
  14. public static String encodeArray(Object[] array) {
  15. if (array == null || array.length == 0) {
  16. return "[]";
  17. }
  19. StringBuilder sb = new StringBuilder();
  20. sb.append("[");
  21. for (int i = 0; i < array.length; i++) {
  22. sb.append(encodeElement(array[i])); // Encode each element
  23. if (i < array.length - 1) {
  24. sb.append(","); // Add comma between elements
  25. }
  26. }
  27. sb.append("]");
  28. return sb.toString();
  29. }
  31. /**
  32. * Encodes a single element to a string representation. Handles different data types.
  33. *
  34. * @param element The element to encode.
  35. * @return The encoded string representation of the element.
  36. */
  37. private static String encodeElement(Object element) {
  38. if (element == null) {
  39. return "null"; // Handle null elements
  40. }
  42. if (element instanceof String) {
  43. return "\"" + element.toString() + "\""; // String elements are enclosed in quotes
  44. } else if (element instanceof Integer || element instanceof Long || element instanceof Short || element instanceof Byte) {
  45. return element.toString(); // Numeric elements are represented as strings
  46. } else if (element instanceof Boolean) {
  47. return element.toString(); // Boolean elements are represented as strings
  48. } else {
  49. return element.toString(); // Default to toString() for other types
  50. }
  51. }
  54. public static void main(String[] args) {
  55. //Example Usage
  56. Integer[] intArray = {1, 2, 3, 4, 5};
  57. String[] stringArray = {"apple", "banana", "cherry"};
  58. Object[] mixedArray = {1, "hello", true, null, 3.14};
  60. System.out.println("Integer Array: " + encodeArray(intArray));
  61. System.out.println("String Array: " + encodeArray(stringArray));
  62. System.out.println("Mixed Array: " + encodeArray(mixedArray));
  63. System.out.println("Null Array: " + encodeArray(null));
  64. System.out.println("Empty Array: " + encodeArray(new Object[0]));
  65. }
  66. }

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