Redirect stdout to a string in Java

Question

I know how to redirect the stdout to a file, but I have no idea on how to redirect it to a string.

xav · Accepted Answer · 2016-09-13 13:28:33Z

62

Yes - you can use a ByteArrayOutputStream:

ByteArrayOutputStream baos = new ByteArrayOutputStream();
System.setOut(new PrintStream(baos));

Then you can get the string with baos.toString().

To specify encoding (and not rely on the one defined by the platform), use the PrintStream(stream, autoFlush, encoding) constructor, and baos.toString(encoding)

If you want to revert back to the original stream, use:

System.setOut(new PrintStream(new FileOutputStream(FileDescriptor.out)));

edited Sep 13, 2016 at 13:28

xav

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answered Nov 15, 2010 at 10:27

Bozho

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