source: doc/theses/jiada_liang_MMath/testP3.java@ d7cb0f7

import java.io.*;
import java.util.Random;

public class testP3 {
        static Random rand = new Random();
        enum Weekday {
                Mon(rand.nextInt()), Tue(rand.nextInt()), Wed(rand.nextInt()), Thu(rand.nextInt()), Fri(rand.nextInt()),
                Sat(rand.nextInt()), Sun(rand.nextInt()); // must appear first
                private int day;
                private Weekday( int d ) { day = d; }

                public boolean isWeekday() {
                        return day <= Fri.day;
                }
                public boolean isWeekend() {
                        return Fri.day < (int)day;
                }
        }

        public static void main( String[] args ) {
                Weekday day = Weekday.Sat;
                System.out.println( day.ordinal() + " " + day.day + " " + day.name() );
                for ( Weekday iday : day.values() ) {
                        System.out.print( iday.ordinal() + " " + iday.day + " " + iday.name() + ",  " );
                }
                System.out.println();
                System.out.println( day.isWeekday() );  // false
                System.out.println( day.isWeekend() );  // true

                Weekday day2 = Weekday.Sat;
                System.out.println( day2.ordinal() + " " + day2.day + " " +  day2.name() );
                for ( Weekday iday : day2.values() ) {
                        System.out.print( iday.ordinal() + " " + iday.day + " " + iday.name() + ",  " );
                }
                System.out.println();
                System.out.println( day2.isWeekday() );  // false
                System.out.println( day2.isWeekend() );  // true
        }
}

// java test