package com.tutego.insel.solutions.lang;

public class Teilstring
{
  public static String replaceString( String s, String s1, String s2 )
  {
    String result = s;

    for ( int i = s.indexOf( s1 ); i >= 0; )
    {
      result = result.substring( 0, i ) + s2 + result.substring( i + s1.length() );

      i = result.indexOf( s1 );
    }
    return result;
  }

  public static void main( String[] args )
  {
    System.out.println( replaceString( "abcdebcdfgbcd", "bcd", "xyz123" ) );
  }
}