java - How to use constructor in enum? -

i want use enum create singleton class in java. should this:

public enum mysingleton implements myinterface {      instance;     private final myobject mystring;      private mysingleton(myobject mystring) {         this.mystring= mystring;     } } 

looks cannot use parameters in constructor. there workaround this? in advance

yor enum wrong. below correct declaration:

public class hello {      public enum myenum {              one("one value"), two("two value"); //here elements of enum.             private string value;              private myenum(string value) {                  this.value = value;                 system.out.println(this.value);               }              public string getvalue() {                  return value;              }      } public static void main(string[] args) {          myenum e = myenum.one;      }  } 

output:

one value 2 value 

conctructor invoked each element of enum.