Understanding Enums in Java

Question

What are java enums? How do they work? Where could I used them and how?
Can I do without using enums in an app or are they so powerful that Its better to use them than i

Answer 1

Think of Enum as follows

public class MyEnum {

    // Object instantiated at declaration
    public static final MyEnum ONE = new MyEnum();
    public static final MyEnum TWO = new MyEnum();
    public static final MyEnum THREE = new MyEnum();

    // Notice a private constructor 
    // There is no way outside MyEnum class call it
    private MyEnum() { ... }


}

So a MyEnum as a enum would be

public enum MyEnum {
    ONE,
    TWO,
    THREE;
}

Both are similar

regards,