java - Enum constructor takes in more parameters than specified -

i have following code , try understand does

public enum exampleclass {     instance("nothing"),     item;      private string description;      private exampleclass(string description) {          this.description = description;     }      static{          item = new exampleclass("item", 1, "this item");     } } 

my questions are:

1. what instance("nothing") ?
2. the exampleclass takes in 1 variable in constructor, why inside static block item takes in 3?

exampleclass enum. instance , item 2 instances of exampleclass (called enum constants). example, valid :

public enum exampleclass {   instance,   item; } 

that said, can define own constructors enum, 1 :

private exampleclass(string description) {      this.description = description; } 

in same way classes, if define custom constructor, jvm not create default constructor.

• instance("nothing") instantiated using custom constructor.
• item not valid because there no 'no-arg' constructor.

this valid:

public enum exampleclass {   instance("nothing"),   item;    private string description;    //will used instantiate instance("nothing")   private exampleclass(string description) {      this.description = description;   }    //will used instantiate item   private exampleclass() {   } } 

new exampleclass("item", 1, "this item"); worse : cannot instantiate enum new. 1 instance of every enum literal can exist , handled jvm itself.and if possible, there no constructor 3 args still not compile