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");
}

}

Alarm Clock using Java Schedular

How to implement alarm clock functionality to alarm sound at 7 am on week days and 10 am on weekends using java schedular

Steps to schedule a alarm clock during the week days or week ends

Step1. Write an abstract class wich implements Runnable and has the method to implement the logic to alarm sound.

package com.vels.test;

import java.util.TimerTask;
/**
* @author velmurugan pousel
* @project test
* created on Feb 1, 2011
*/
public abstract class SchedulerTask implements Runnable {

final Object lock = new Object();

int state = VIRGIN;
static final int VIRGIN = 0;
static final int SCHEDULED = 1;
static final int CANCELLED = 2;

TimerTask timerTask;

protected SchedulerTask() {
}

public abstract void run();

public boolean cancel() {
synchronized(lock) {
if (timerTask != null) {
timerTask.cancel();
}
boolean result = (state == SCHEDULED);
state = CANCELLED;
return result;
}
}

public long scheduledExecutionTime() {
synchronized(lock) {
return timerTask == null ? 0 : timerTask.scheduledExecutionTime();
}
}

Wake up! It's 02 Mar 2011 12:48:00.011
.....



Reference : http://www.ibm.com/

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