public StrBuilder deleteAll(final String str){
  final int len=(str == null ? 0 : str.length());
  if (len > 0) {
    int index=indexOf(str,0);
    while (index >= 0) {
      deleteImpl(index,index + len,len);
      index=indexOf(str,index);
    }
  }
  return this;
}

public StrBuilder deleteAll ( final String str ) { final int len = ( str == null ? 0 : str . length ( ) ) ; if ( len > 0 ) { int index = indexOf ( str , 0 ) ; while ( index >= 0 ) { deleteImpl ( index , index + len , len ) ; index = indexOf ( str , index ) ; } } return this ; }
deletes the string wherever it occurs in the builder .
