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Program: How to create custom constructor enum?


This example gives you how to create custom constructor for enum. The constructor should be either private or default scope, should not be protected or public. All elements defined in the enum must call constructor.

package com.java2novice.enums;

public class MyEnumCustomConstructor {

	enum Department{
		private int deptId;
		Department(int id){
			deptId = id;
		public int getDeptId(){
			return deptId;
	public static void main(String a[]){
		System.out.println("Accounts dept id:"+Department.ACCOUNT.getDeptId());
		System.out.println("HR dept id:"+Department.HR.getDeptId());
		System.out.println("Security dept id:"+Department.SECURITY.getDeptId());

Accounts dept id:12
HR dept id:24
Security dept id:108
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What is adapter class?
An adapter class provides the default implementation of all methods in an event listener interface. Adapter classes are very useful when you want to process only few of the events that are handled by a particular event listener interface. You can define a new class by extending one of the adapter classes and implement only those events relevant to you.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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