Recombination of a String

3 Nov
import java.util.*;
class MainClass{
public static void main(String args[]){
    Scanner input=new Scanner(System.in);
String s =input.nextLine();
  if(s!= null && s.length()!=0)
   RecCombine("",s);
 }
 
 static void RecCombine(String prefix,String rest){
  if(rest.length() == 0)
   System.out.print(prefix + " ");
  else{
   RecCombine(prefix + rest.charAt(0),rest.substring(1));
   RecCombine(prefix,rest.substring(1));
   
  }
 }
}
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