Implementation of comparator in FIFO Scheduler

2. Class Jobqueuejobinprogresslistener extends Jobinprogresslistener, Where Jobqueuejobinprogresslistener has a static inner class Jobschedulinginfo
4. int compare (object O1, Object O2) returns the integral type of a primitive type
   If you want to sort in ascending order,
   Then O1 is less than O2, returns 1 (negative number), equals returns 0,01 greater than 02 returns 1 (positive number)
   If you want to sort in descending order
   Then O1 is less than O2, returns 1 (positive), equals returns 0,01 greater than 02 returns-1 (negative number)
6. Sort by jobschedulinginfo information in ascending order
7. Static final comparator<jobschedulinginfo> Fifo_job_queue_comparator
   = new Comparator<jobschedulinginfo> () {
   public int Compare (Jobschedulinginfo O1, Jobschedulinginfo O2) {
   int res = o1.getpriority (). CompareTo (O2.getpriority ());
   if (res = = 0) {
   if (O1.getstarttime () < O2.getstarttime ()) {
   res =-1;
   } else {
   res = (O1.getstarttime () = = O2.getstarttime ()? 0:1);
   }
   }
   if (res = = 0) {
   res = O1.getjobid (). CompareTo (O2.getjobid ());
   }
   return res;
   }
   };

The specific implementation of the comparator in the FIFO scheduler