public RE(Object pattern, int cflags, RESyntax syntax) throws REException { this(pattern,cflags,syntax,0,0);
public RE(Object pattern) throws REException { this(pattern,0,RESyntax.RE_SYNTAX_PERL5,0,0);
  public RE(Object pattern, int cflags, RESyntax syntax) throws REException {    this(pattern,cflags,syntax,0,0);  }