Comments on: How to redirect console output to file using Java?

By: Rituparna

Rituparna — Mon, 12 Dec 2011 09:06:37 +0000

I have done as commented by Mari. I am getting reuired output in out.txt file.All is Ok except that I want to view the same output in console also, that is output in both Console and out.txt file. But I am getting no output printed in console.

By: Mari

Mari — Fri, 03 Jun 2011 23:41:22 +0000

Hello,

Just add the code in the main class
, just after the declaration of main method
every line of your original code within the “try” block.

PrintStream orgStream = null;
PrintStream fileStream = null;
try
{
// Saving the orginal stream
orgStream = System.out;
fileStream = new PrintStream(new FileOutputStream(“out.txt”,true));
// Redirecting console output to file
System.setOut(fileStream);
// Redirecting runtime exceptions to file
System.setErr(fileStream);

// Here all your original code

throw new Exception(“Test Exception”);

}
catch (FileNotFoundException fnfEx)
{
System.out.println(“Error in IO Redirection”);
fnfEx.printStackTrace();
}
catch (Exception ex)
{
//Gets printed in the file
System.out.println(“Redirecting output & exceptions to file”);
ex.printStackTrace();
}
finally
{
//Restoring back to console
System.setOut(orgStream);
//Gets printed in the console
System.out.println(“Redirecting file output back to console”);

}

Thank you very much, this code helped me a lot.

By: bella

bella — Thu, 02 Jun 2011 09:20:13 +0000

Unable to run this program. Package is out of bounds . Help out.

By: Roshidah

Roshidah — Wed, 03 Nov 2010 04:57:19 +0000

Dear respected Sir/Madam,

I’ve tried using the example, thanks, it worked but can’t I view the “out.txt” file?

By: Michael

Michael — Fri, 17 Sep 2010 21:09:51 +0000

Thanks for the great example! This was exactly what I was looking for…