enum constructor help

[Sun Craven]

given the following test
enum AccountType {
SAVING, FIXED, CURRENT;
private AccountType() {
System.out.println("It is a account type");
}
}
class EnumOne {
public static void main(String[] args) {
System.out.println(AccountType.FIXED);
}
}
the answer is :Compiles fine and output is prints "It is a account type" thrice followed by "FIXED
quto source :http://www.javabeat.net/javabeat/scjp5/mocks/scjp_5_0_mock_questions_enums_part2.php
So i confused by when the enum constructor run..
Thanks
sun jiuzhen
[ March 13, 2008: Message edited by: sun jiuzhen ]

[Henry Wong]

Source " Free online mock test"

Please Quote Your Sources. We need a recognizable source, or a link.

Thanks,
Henry

[Jelle Klap]

An enum type's constructor will run once for every constant it defines when the enum type is first used. For instance:

public class EnumExample
{
  enum MyEnum
  {
    A("A"), B("B");
 
    private final String type;
 
    private MyEnum(String type)
    {
      System.out.println("Invoked for type: " + type);
      this.type = type;
    }
  }
 
  public static void main(String[] args)
  {
    System.out.println(MyEnum.A);
    // Will print:
    //   Invoked for type: A
    //   Invoked for type: B
    //   A
 
    System.out.println(MyEnum.B);
    // Will print:
    //   B
  }
}

Try playing around with it.

[Padmanabh Sahasrabudhe]

Thanks Jelle. It answers. I just added One more SOP and the output confirmed me that.

    public class EnumExample
{
  enum MyEnum
  {
    A("A"), B("B");
 
    private final String type;
 
    private MyEnum(String type)
    {
      System.out.println("Invoked for type: " + type);
      this.type = type;
    }
  }
 
  public static void main(String[] args)
  {
    System.out.println(MyEnum.A);
    // Will print:
    //   Invoked for type: A
    //   Invoked for type: B
    //   A
 
    System.out.println(MyEnum.B);
System.out.println(MyEnum.A);
    // Will print:
    //   B
  }
}

Output:
C:\>java EnumExample
Invoked for type: A
Invoked for type: B
A
B
A

[Milton Ochoa]

Padmanabh, sorry by contactin in this way, but you askme something via email, but Im unavailable to contact you via email or private mensaje!.
so.... sorry for no give you a answer!