Enum

Enum for Singleton and Utility class

enum Singleton {
    INSTANCE;
}
enum Utility {
    ; // no instances
}

Related Article:

Reference: Java Secret: Using an enum to build a State machine from our JCG partner Peter Lawrey at the Vanilla Java blog

Ilias Tsagklis

Ilias is a software developer turned online entrepreneur. He is co-founder and Executive Editor at Java Code Geeks.
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