Monday, November 15, 2010

Java Program to re-direct all the console output into a File

package com.vels.util;

/**
* Re-Direct All Console output into File
* @author Velmurugan Pousel
* @date 10 november 2010
* @version 0.1
*/

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;

public class RedirectIO
{

public static void main(String[] args)
{
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.out.println(" samp[le test......");
System.setErr(fileStream);
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();System.out.println("Error in IO
Redirection");
}
finally
{
//Restoring back to console

//Gets printed in the console
System.out.println("Redirecting file output back to
console");
System.setOut(orgStream);
System.out.println("Error in IO Redirection");
}

}
}

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