Friday, September 16, 2011

Find contents in files

Suppose, there are many files that contains "CONTENT" you want to search, use the following command in the Linux terminal.

grep "CONTENT" *.*

Friday, September 9, 2011

Create Scheduler in Java


Some applications need to run on a scheduled time. This java application runs on every Sunday midnight.

import java.util.Calendar;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

public class ScheduleTest extends TimerTask {

public void run() {
         System.out.println("Schedule working ");
         //TODO
      }
}

class Application {

public static void main(String[] args) {

    Timer timer = new Timer();
    Calendar date = Calendar.getInstance();
       
         date.set(
                  Calendar.DAY_OF_WEEK,
                  Calendar.SUNDAY
         );

         date.set(Calendar.HOUR, 0);
         date.set(Calendar.MINUTE, 0);
         date.set(Calendar.SECOND, 0);
         date.set(Calendar.MILLISECOND, 0);

// Schedule to run every Sunday in midnight

         timer.schedule(
         new ScheduleTest (),
         date.getTime(),
         1000 * 60 * 60 * 24 * 7
         );
    }
}