 | /** Grades of courses */enumGrade{A,B,C,D,F};// ...privateGradegradeA=Grade.A; |
This enumeration constant then can be passed in to methods:
| student.assignGrade(gradeA);/** * Assigns the grade for this course to the student * @param GRADE Grade to be assigned */publicvoidassignGrade(finalGradeGRADE){grade=GRADE;} |
An enumeration may also have parameters:
| publicenumDayOfWeek{/** Enumeration constants */MONDAY(1),TUESDAY(2),WEDNESDAY(3),THURSDAY(4),FRIDAY(5),SATURDAY(6),SUNDAY(0);/** Code for the days of the week */privatebytedayCode=0;/** * Private constructor * @param VALUE Value that stands for a day of the week. */privateDayOfWeek(finalbyteVALUE){dayCode=java.lang.Math.abs(VALUE%7);}/** * Gets the day code * @return The day code */publicbytegetDayCode(){returndayCode;}} |
It is also possible to let an enumeration implement interfaces other thanjava.lang.Comparable andjava.io.Serializable, which are already implicitly implemented by each enumeration:
| publicenumDayOfWeekimplementsRunnable{MONDAY,TUESDAY,WEDNESDAY,THURSDAY,FRIDAY,SATURDAY,SUNDAY;/** * Run method prints all elements */publicvoidrun(){System.out.println("name() = "+name()+", toString() = \""+toString()+"\"");}} |