source: doc/theses/jiada_liang_MMath/test.java@ e15293b

import java.io.*;

public class test {
        enum Week {
                Mon, Tue, Wed, Thu, Fri, Sat, Sun;
                public boolean isWeekday() { return ordinal() <= Fri.ordinal(); }
                public boolean isWeekend() { return Fri.ordinal() < ordinal(); }
        }
        

        // object oriented definition
        enum Week2 {
                //          Mon, Tue, Wed, Thu, Fri, Sat, Sun;
                Mon(1), Tue(2), Wed(3), Thu(4), Fri(5), Sat(6), Sun(7); // must appear first
                public long day;
                private Week2( long d ) { day = d; }

                public boolean isWeek() {
                        return ordinal() <= Week2.Fri.ordinal();
                }
                public boolean isWeekend() {
                        return Week2.Fri.ordinal() < ordinal();
                }
        }

        public static void main( String[] args ) {
                // non-object oriented usage
                Week day = Week.Sat;
                
                day = Week.valueOf( "Sat" );
                System.out.println( day.ordinal() + " " + day + " " + day.name() ); // 5 Sat
                System.out.println( day.isWeekday() );  // false
                System.out.println( day.isWeekend() );  // true

                if ( day == Week.Fri )
                        System.out.println( "weekday" );
                switch ( day ) {
                  case Mon: case Tue: case Wed: case Thu: case Fri:
                        System.out.println( "weekday" );
                        break;
                  case Sat: case Sun:
                        System.out.println( "weekend" );
                        break;
                }
                for ( Week d : Week.values() ) {
                        System.out.print( d + " " + d.ordinal() + " " );
                }
                System.out.println(); System.out.println();

                // object oriented usage
                Week2 cday = Week2.Sat;
                cday.day += 42;
                System.out.println( cday.ordinal() + " " + cday.day + " " +  cday.name() );

                System.out.println( cday.isWeek() );  // false
                System.out.println( cday.isWeekend() );  // true

                switch ( cday ) {
                  case Mon: case Tue: case Wed: case Thu: case Fri:
                        System.out.println( "weekday" );
                        break;
                  case Sat: case Sun:
                        System.out.println( "weekend" );
                        break;
                }
                for ( Week2 icday : Week2.values() ) {
                        System.out.print( icday.ordinal() + " " + icday.day + " " +  icday.name() + ",  " );
                }
                System.out.println();

                int intArray[];
                intArray = new int[20];
                intArray[Week.Fri] = 3;
        }
}

// java test