What is Enum?

[Arun Kumar Gaddam]

hai friends ,iam new java 5
Can any body explain me what is an Enum?

[Chandra Bhatt]

Originally posted by Arun Kumar Gaddam:
hai friends ,iam new java 5
Can any body explain me what is an Enum?

public abstract class java.lang.Enum implements java.lang.Comparable, java.io.Serializable {}

package myenum;
 
enum CoffeeSize {
SMALL(10),BIG(21),HUGE(40);

CoffeeSize(int size) {
this.size =size;
};


public String toString() {
return this.name();
}
private int size;

}
 
public class EnumTest {
public static void main(String... args) {
CoffeeSize cs = CoffeeSize.BIG;

System.out.println(cs instanceof Enum); //true
System.out.println(cs.getClass().getSuperclass());
}
}
 

Output:
true
class java.lang.Enum


Thanks,

[Faisal Ahmad]

Originally posted by Arun Kumar Gaddam:
hai friends ,iam new java 5
Can any body explain me what is an Enum?

enum is a Java keyword used in defining enumerated list of constants. It also declares a class of type "enum". You can declare methods and variables too! Its also allowed to implement interfaces. Well, there is lot more that you can do with enum in Java than its counterparts in C++/C/C#!
Check this link for a very good introduction and explanation http://java.sun.com/j2se/1.5.0/docs/guide/language/enums.html
Its very short too!
PS: By the way, enumeration means a numbered list!

[Barry Gaunt]

You can also read the Enums section of Sun's Java Tutorial