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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		String[][] data = new String[4][];
  13.  
  14. 		data[0] = new String[4];
  15. 		data[0][0] = "Columbia";
  16. 		data[0][1] = "Chile";
  17. 		data[0][2] = "Asia";
  18. 		data[0][3] = "US";
  19.  
  20. 		data[1] = new String[3];
  21. 		data[1][0] = "B216";
  22. 		data[1][1] = "B217";
  23. 		data[1][2] = "A442";
  24. 		// data[1][3] = "N665";
  25.  
  26. 		data[2] = new String[4];
  27. 		data[2][0] = "This";
  28. 		data[2][1] = "Is";
  29. 		data[2][2] = "So";
  30. 		data[2][3] = "Cool";
  31.  
  32. 		data[3] = new String[3];
  33. 		data[3][0] = "Holy";
  34. 		data[3][1] = "Z";
  35. 		data[3][2] = "AZZZ";
  36.  
  37. 		List<String[]> list = new ArrayList<>();
  38.  
  39. 		// Sort the String array and insert it in List
  40. 		for (String dataArr[] : data) {
  41. 			String s[] = dataArr.clone(); // create new object of String array
  42. 			Arrays.sort(s); // Sort newly created String array
  43. 			list.add(s);
  44. 		}
  45.  
  46. 		// Sort the list using custom comparator
  47. 		Collections.sort(list, new Comparator<String[]>() {
  48.  
  49. 			@Override
  50. 			public int compare(String[] o1, String[] o2) {
  51.  
  52. 				// optional: condition to check for string length equality
  53. 				if (o1.length == o2.length) {
  54. 					for (int i = 0; i < o1.length; i++) {
  55. 						if (o1[i].equals(o2[i])) { // ** IMP **
  56. 							// allows scanning through entire string array.
  57. 							continue;
  58. 						}
  59. 						// Find the first different strings in both arrays
  60. 						return o1[i].compareTo(o2[i]);
  61. 					}
  62. 				} else if (o1.length < o2.length) {
  63. 					// allow string arrays with lesser elements to appear first
  64. 					return -1;
  65. 				} else if (o1.length > o2.length) {
  66. 					return 1;
  67. 				}
  68.  
  69. 				// When o1.length == o2.length and all strings are equal
  70. 				return 0; // no difference
  71. 			}
  72.  
  73. 		});
  74.  
  75. 		// Printing the original array and our list
  76. 		System.out.println(Arrays.deepToString(data));
  77. 		System.out.println();
  78. 		for (String s[] : list) {
  79. 			System.out.println(Arrays.toString(s));
  80. 		}
  81.  
  82. 	}
  83. }
Success #stdin #stdout 0.04s 4386816KB
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Standard input is empty
stdout
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[[Columbia, Chile, Asia, US], [B216, B217, A442], [This, Is, So, Cool], [Holy, Z, AZZZ]]

[A442, B216, B217]
[AZZZ, Holy, Z]
[Asia, Chile, Columbia, US]
[Cool, Is, So, This]
https://ideone.com/QDZ5pr
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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