Get enum by its inner field

Question

Have enum with inner fields, kind of map.

Now I need to get enum by its inner field.

Wrote this:

package test;

/**
 * Test enum to test enum         


        

Answer 1

One solution is to add

public final Test[] TESTS = { null, ONE, TWO, THREE };

public static Test getByNumber(int i) {
    return TESTS[i];
}

To the enum.

If the internal data is not an integer, you could have a Map which you populate in a static { ... } initializer. This map could later be used in the getByNumber method above.