Enum with int value in Java

Question

What\'s the Java equivalent of C#\'s:

enum Foo
{
  Bar = 0,
  Baz = 1,
  Fii = 10,
}

Answer 1

It is:

enum Foo
{
  Bar(0),
  Baz(1),
  Fii(10);

  private int index;

  private Foo(int index) {
      this.index = index;
  }
}

Note that to get the value of the enum from the index, Foo.valueOf(1) (*), would not work. You need do code it yourself:

public Foo getFooFromIndex(int index) {
    switch (index) {
    case 0:
        return Foo.Bar;
    case 1:
        return Foo.Baz;
    case 10:
        return Foo.Fii;

    default:
        throw new RuntimeException("Unknown index:" + index);
    }
}

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(*): Enum.valueOf() return the enum from a String. As such, you can get the value Bar with Foo.valueOf('Bar')