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  1. import java.util.ArrayList;
  2. import java.util.List;
  3. class Combinations {
  4.  
  5. 	public static void main(String[] args) {
  6. 		ArrayList<List<Character>> array = new ArrayList<List<Character>>();
  7.  
  8. 		ArrayList<Character> a1 = new ArrayList<Character>();
  9. 		ArrayList<Character> a2 = new ArrayList<Character>();
  10. 		ArrayList<Character> a3 = new ArrayList<Character>();
  11. 		a1.add('1');
  12. 		a1.add('2');
  13. 		a1.add('3');
  14.  
  15. 		a2.add('A');
  16. 		a2.add('B');
  17. 		a2.add('C');
  18.  
  19. 		a3.add('*');
  20. 		a3.add('#');
  21.  
  22. 		array.add(a1);
  23. 		array.add(a2);
  24. 		array.add(a3);
  25.  
  26. 		List<String> result = new ArrayList<String>();
  27. 		GeneratePermutations(array, result, 0, "");
  28.  
  29. 		for(String str : result) System.out.println(str);
  30. 	}
  31.  
  32. 	public static void GeneratePermutations(List<List<Character>> Lists, List<String> result, int depth, String current)
  33. 	{
  34. 	    if(depth == Lists.size())
  35. 	    {
  36. 	       result.add(current);
  37. 	       return;
  38. 	     }
  39.  
  40. 	    for(int i = 0; i < Lists.get(depth).size(); ++i)
  41. 	    {
  42. 	        GeneratePermutations(Lists, result, depth + 1, current + Lists.get(depth).get(i));
  43. 	    }
  44. 	}
  45. }
Success #stdin #stdout 0.04s 711168KB
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stdin
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Standard input is empty
stdout
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1A*
1A#
1B*
1B#
1C*
1C#
2A*
2A#
2B*
2B#
2C*
2C#
3A*
3A#
3B*
3B#
3C*
3C#
https://ideone.com/DKlA5B
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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