Enum:

It is a special data type used to define fixed set of constants . Enum can contain constants, methods etc. We can use enum with switch statement easily. Enum keyword is used to create enums.

Example:

    class EnumDemo{  
    public enum Constant { Constant1, Constant2, Constant3, Constant4 }  
      
    public static void main(String[] args) {  
    for (Constant c : Constant.values())  
    System.out.println(c);  
      
    }}  

It will output:

Output:Constant1
       Constant2
       Constant3
       Constant4

Using Enum with Switch Statement:

    class EnumDemo1{  
    enum Days{ SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY}  
    public static void main(String args[]){  
    Day days=Days.MONDAY;  
      
    switch(days){  
    case SUNDAY:   
     System.out.println("sunday");  
     break;  
    case MONDAY:   
     System.out.println("monday");  
     break;  
    default:  
    System.out.println("other day");  
    }  
    }}  

It will output : monday