public BufferedTokenStream(TokenSource tokenSource) {if (tokenSource == null) {throw new NullPointerException("tokenSource cannot be null");}this.tokenSource = tokenSource;}

public BufferedTokenStream ( TokenSource tokenSource ) { if ( tokenSource == null ) { throw new NullPointerException ( "tokenSource cannot be null" ) ; } this . tokenSource = tokenSource ; }
public BufferedTokenStream(ITokenSource tokenSource){if (tokenSource == null){throw new ArgumentNullException("tokenSource cannot be null");}this._tokenSource = tokenSource;}
