PrintWriter - Dúvida

1. Qual a diferença?

out = new PrintWriter(new FileWriter("teste.txt" ));
e
out = new PrintWriter("teste.txt");

Se ambas geram o arquivo "teste.txt".

Agradeço desde já!

GUJ Expert Membro desde: 12/03/2003 11:25:57 Mensagens: 4680 Offline

JavaDoc

/**
     * Creates a new PrintWriter, without automatic line flushing, with the
     * specified file name.  This convenience constructor creates the necessary
     * intermediate {@link java.io.OutputStreamWriter OutputStreamWriter},
     * which will encode characters using the {@linkplain
     * java.nio.charset.Charset#defaultCharset default charset} for this
     * instance of the Java virtual machine.
     *
     * @param  fileName
     *         The name of the file to use as the destination of this writer.
     *         If the file exists then it will be truncated to zero size;
     *         otherwise, a new file will be created.  The output will be
     *         written to the file and is buffered.
     *
     * @throws  FileNotFoundException
     *          If the given string does not denote an existing, writable
     *          regular file and a new regular file of that name cannot be
     *          created, or if some other error occurs while opening or
     *          creating the file
     *
     * @throws  SecurityException
     *          If a security manager is present and {@link
     *          SecurityManager#checkWrite checkWrite(fileName)} denies write
     *          access to the file
     *
     * @since  1.5
     */
    public PrintWriter(String fileName) throws FileNotFoundException {
	this(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName))),
	     false);
    }

JavaEvangelist Membro desde: 17/08/2006 19:03:36 Mensagens: 477 Offline

A unica diferença eh o argumento que tu passa para o construtor.
Um eh um FileWriter e o outro uma String.
De resto eh igual.

é o que marcos falou.. isso seria redudante.... ambos casos acima.. criar o arquivo e vc ja pode escrever nele..

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