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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. import java.util.ArrayList;
  7.  
  8. /* Name of the class has to be "Main" only if the class is public. */
  9. class Ideone
  10. {
  11. 	public static void main (String[] args) throws java.lang.Exception
  12. 	{
  13. 		int[][] array = { 
  14.               {100, 12 , 0, 3},
  15.               {100, 177, 0, 3},
  16.               {100, 233, 0, 3}, 
  17.               {100, 144242, 0, 3},
  18.               {100, 14, 0, 4},  
  19.               {100, 12234, 0, 4},
  20.               {100, 134, 1, 4},
  21.               {2, 15, 0, 3},
  22.               {23, 1533, 0, 3},
  23.               {23, 1322, 1, 4}, 
  24.               {23, 13, 1, 4}, 
  25.               {23, 122, 1, 4},
  26.               {1321, 142, 1, 4},
  27.               {1321, 133,1, 4},
  28.               {3, 16, 0, 5},
  29.               {55, 1003, 0,3},
  30.               {553, 1002, 2, 6},
  31.               {31, 162, 0, 5},
  32.               {7, 1626, 0, 5},
  33.               {7, 2336, 0,5}           
  34.              };
  35.       ArrayList<Integer> list = new ArrayList<>();
  36.       for(int i = 0 ; i < array.length ;i++ ){
  37.  
  38.               if(!list.contains(array[i][0])){
  39.                   list.add(array[i][0]);
  40.               }
  41.       }
  42.       for(int i = 0 ; i < list.size() ;i++){
  43.           System.out.println(list.get(i));
  44.       }
  45. 	}
  46. }
Success #stdin #stdout 0.1s 320512KB
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stdin
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Standard input is empty
stdout
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100
2
23
1321
3
55
553
31
7
https://ideone.com/E6uweO
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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