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Ashish Pandey

Total Post:128

Posted on    August-10-2015 11:44 PM

 Java Java  String 

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What's the best way to pipe the output from an java.io.OutputStream to a String in Java?

Say I have the method:

  writeToStream(Object o, OutputStream out)
Which writes certain data from the object to the given stream. However, I want to get this output into a String as easily as possible.

I'm considering writing a class like this (untested):

class StringOutputStream extends OutputStream {
  StringBuilder mBuf;
  public void write(int byte) throws IOException {
    mBuf.append((char) byte);
  public String getString() {
    return mBuf.toString();
But is there a better way? I only want to run a test!

Mayank Tripathi
Mayank Tripathi

Total Post:397

Posted on    August-11-2015 4:41 AM

I would use a ByteArrayOutputStream. And on finish you can call:

new String( baos.toByteArray(), codepage );
or better

baos.toString( codepage );
For the String constructor the codepage can be a String or an instance of java.nio.charset.Charset. A possible value is java.nio.charset.StandardCharsets.UTF_8.

The method toString accept only a String as codepage parameter (stand Java 8).

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