How to convert String into Enum in Java

Question

I want to convert a string say "98989" into an integer without using any library functions in java. Give fastest way to do it and explain why your method is best.

Answer 1

Use the valueOf method on the ENUM class.

DemoType demoType =   DemoType.valueOf("DAILY")

It'll throw an IllegalArgumentException should the string argument provided be invalid. Using your example

DemoType demoType =  DemoType.valueOf("HOURLY");

The line above will throw an IllegalArgumentException because HOURLY is not part of your DemoType