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  1. import java.util.*;
  2. import java.lang.*;
  3.  
  4. class Main
  5. {
  6. 	public static void main (String[] args) throws java.lang.Exception
  7. 	{
  8. 		List<String> src = Arrays.asList(new String[] {
  9.             "<prefix-1>/A",
  10.             "<prefix-1>/B",
  11.             "<prefix-2>/A",
  12.             "<prefix-2>/B",
  13.             "<prefix-3>/A",
  14.             "<prefix-3>/B"  	
  15. 		});
  16.         List<String> res = new ArrayList<String>();
  17.         String last = null;
  18.         for (String s : src) {
  19.             String cand = s.substring(0, s.lastIndexOf('/'));
  20.             if (!cand.equals(last)) {
  21.                 res.add(last = cand);
  22.             }
  23.         }
  24.         for (String s : res) {
  25.             System.out.println(s);
  26.         }
  27. 	}
  28. }
Success #stdin #stdout 0.07s 380160KB
comments (?)
stdin 
Standard input is empty
stdout 
<prefix-1>
<prefix-2>
<prefix-3>
https://ideone.com/HewvfX
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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