Convert Enum Ordinal to Type: Java Programming Tips

If you're working with enums in Java, you may encounter a situation where you need to convert an enum ordinal to its corresponding type. This can be particularly useful when you're dealing with serialized data or when you need to store the ordinal value in a database.

To convert an enum ordinal to its corresponding type in Java, you can use the values() method provided by the Enum class. This method returns an array of all the enum values in the order they were declared.

Here's an example:

public enum Color {
    RED, BLUE, GREEN
}

int ordinal = 1;
Color color = Color.values()[ordinal];

In this example, we have an enum called Color with three values: RED, BLUE, and GREEN. We also have an integer variable called ordinal set to 1. To convert the ordinal value to its corresponding type, we simply call the values() method on the Color enum and access the element at the specified index.

In this case, the values() method returns an array with the values RED, BLUE, and GREEN in that order. Since the ordinal value we're interested in is 1, we access the second element in the array (arrays in Java are zero-indexed), which is BLUE.

Using this technique, you can easily convert an enum ordinal to its corresponding type in Java. Just remember to use the values() method and access the element at the specified index.

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