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  1. /* http://es.stackoverflow.com/q/51051/127 */
  2.  
  3. class Ideone
  4. {
  5. 	public static void main (String[] args) throws java.lang.Exception
  6. 	{
  7.         String ruta = "C:\\Archive\\carpeta\\archivo.ej";
  8.         System.out.println("Ruta: " + ruta);
  9.  
  10.         ruta = ruta.replaceFirst("^C:\\\\Archive(?:\\\\+|$)", "E:\\\\");
  11.         System.out.println("Reemplazada: " + ruta);
  12. 	}
  13. }
Success #stdin #stdout 0.04s 4386816KB
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Standard input is empty
stdout
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Ruta: C:\Archive\carpeta\archivo.ej
Reemplazada: E:\carpeta\archivo.ej
https://ideone.com/Dy4gOi
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
secret

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