public class Exam
{
   private int day;
   private int month;
   private int year;
   private int hour;
   private int minutes;
   private double maxMarks;

   private final String type;
   private final int order;

   private static int labExamCounter = 0;
   private static int midtermExamCounter = 0;

   public static final String LAB_EXAM = "Lab Exam";
   public static final String MIDTERM_EXAM = "Midterm Exam";
   public static final String FINAL_EXAM = "Final Exam";

   public Exam(String type)
   {
    this (type, 0, 0, 0, 0, 0, 0);
   }

   public Exam(String type, double maxMarks)
   {
    this (type, maxMarks, 0, 0, 0, 0, 0);
   }

   public Exam(String type, double maxMarks, int day, int month, int year)
   {
    this (type, maxMarks, day, month, year, 0, 0);
   }

   public Exam(Exam other)
   {
    this (other.getType(), other.getMaxMarks(), other.getDay(), other.getMonth(), other.getYear(), other.getHour(), other.getMinutes());
   }

   public Exam(String type, double maxMarks, int day, int month, int year, int hour, int minutes)
   {
      switch( type ) {
         case LAB_EXAM:
            this.order = ++labExamCounter;
            this.maxMarks = (maxMarks > 5 && maxMarks <= 10 ? maxMarks : 10 );
            break;

         case MIDTERM_EXAM:
            this.order = ++midtermExamCounter;
            this.maxMarks = (maxMarks > 15 && maxMarks <= 20 ? maxMarks : 20 );
            break;

         case FINAL_EXAM:
            this.order = 0;
            this.maxMarks = (maxMarks > 30 && maxMarks <= 40 ? maxMarks : 40 );
            break;

         default:
            this.order = 0;
      }

      if (day >= 1 && day <= 31)
         this.day = day;

      if (month >= 1 && month <= 12)
         this.month = month;

      if (year > 0)
         this.year = year;

      if (hour >= 0 && hour <= 23)
         this.hour = hour;

      if (minutes >= 0 && minutes <= 59)
         this.minutes = minutes;

      this.type = (type != null ? type : "");
   }

   public String getType()
   {
      return type;
   }

   public void setDay(int day)
   {
      if (day >= 1 && day <= 31)
         this.day = day;
   }

   public int getDay()
   {
      return day;
   }

   public void setMonth(int month)
   {
      if (month >= 1 && month <= 12)
         this.month = month;
   }

   public int getMonth()
   {
      return month;
   }

   public void setYear(int year)
   {
      if (year > 0)
         this.year = year;
   }

   public int getYear()
   {
      return year;
   }

   public void setDate(int day, int month, int year)
   {
      this.setDay(day);
      this.setMonth(month);
      this.setYear(year);
   }

   public void setHour(int hour)
   {
      if (hour >= 0 && hour <= 23)
         this.hour = hour;
   }

   public int getHour()
   {
      return hour;
   }

   public void setMinutes(int minutes)
   {
      if (minutes >= 0 && minutes <= 59)
         this.minutes = minutes;
   }

   public int getMinutes()
   {
      return minutes;
   }

   public void setTime(int hour, int minutes)
   {
      this.setHour(hour);
      this.setMinutes(minutes);
   }

   public void setMaxMarks(double maxMarks)
   {
       switch( this.type ) {
         case LAB_EXAM:
            this.maxMarks = (maxMarks > 5 && maxMarks <= 10 ? maxMarks : 10 );
            break;

         case MIDTERM_EXAM:
            this.maxMarks = (maxMarks > 15 && maxMarks <= 20 ? maxMarks : 20 );
            break;

         case FINAL_EXAM:
            this.maxMarks = (maxMarks > 30 && maxMarks <= 40 ? maxMarks : 40 );
            break;
      }
   }

   public double getMaxMarks()
   {
      return this.maxMarks;
   }

   public String toString()
   {
      return String.format("Exam: %s %s (%04.2f marks)\nDate: %d/%d/%d\nTime: %02d:%02d\n",
                           getType(), (order > 0 ? order : ""), getMaxMarks(), getDay(),
                           getMonth(), getYear(), getHour(), getMinutes());
   }

   public static String getExamStats()
   {
      return LAB_EXAM + ": " + labExamCounter + " exam(s)\n" +
             MIDTERM_EXAM + ": " + midtermExamCounter + " exam(s)\n" ;
   }
}

import static java.lang.System.out;

public class ExamTest
{
   public static void main(String[] args)
   {
       Exam exam1 = new Exam(Exam.FINAL_EXAM);
       exam1.setDate(13, 8, 1439);
       exam1.setTime(8,0);
       exam1.setMaxMarks(50);

       Exam exam2 = new Exam(Exam.MIDTERM_EXAM, 10);
       exam2.setDate(3, 7, 1439);
       exam2.setTime(8,30);

       Exam exam3 = new Exam(Exam.LAB_EXAM, 12, 18, 6, 1439);
       exam3.setTime(8,30);

       Exam exam4 = new Exam("Lab Quiz", 2, 28, 5, 1439, 10, 30);

       Exam exam5 = new Exam(exam3);
       exam5.setDate(10, 7, 1439);

       out.println( "exam1:\n" + exam1.toString() );
       out.println( "exam2:\n" + exam2.toString() );
       out.println( "exam3:\n" + exam3.toString() );
       out.println( "exam4:\n" + exam4.toString() );
       out.println( "exam5:\n" + exam5.toString() );

       out.println( "Exam.getExamStats():\n" + Exam.getExamStats() );
   }