Using Enum values as String literals
You can't. I think you have FOUR options here. All four offer a solution but with a slightly different approach...
Option One: use the built-in name()
on an enum. This is perfectly fine if you don't need any special naming format.
String name = Modes.mode1.name(); // Returns the name of this enum constant, exactly as declared in its enum declaration.
Option Two: add overriding properties to your enums if you want more control
public enum Modes { mode1 ("Fancy Mode 1"), mode2 ("Fancy Mode 2"), mode3 ("Fancy Mode 3"); private final String name; private Modes(String s) { name = s; } public boolean equalsName(String otherName) { // (otherName == null) check is not needed because name.equals(null) returns false return name.equals(otherName); } public String toString() { return this.name; }}
Option Three: use static finals instead of enums:
public final class Modes { public static final String MODE_1 = "Fancy Mode 1"; public static final String MODE_2 = "Fancy Mode 2"; public static final String MODE_3 = "Fancy Mode 3"; private Modes() { }}
Option Four: interfaces have every field public, static and final:
public interface Modes { String MODE_1 = "Fancy Mode 1"; String MODE_2 = "Fancy Mode 2"; String MODE_3 = "Fancy Mode 3"; }
Every enum has both a name()
and a valueOf(String)
method. The former returns the string name of the enum, and the latter gives the enum value whose name is the string. Is this like what you're looking for?
String name = Modes.mode1.name();Modes mode = Modes.valueOf(name);
There's also a static valueOf(Class, String)
on Enum
itself, so you could also use:
Modes mode = Enum.valueOf(Modes.class, name);
You could override the toString()
method for each enum value.
Example:
public enum Country { DE { @Override public String toString() { return "Germany"; } }, IT { @Override public String toString() { return "Italy"; } }, US { @Override public String toString() { return "United States"; } }}
Usage:
public static void main(String[] args) { System.out.println(Country.DE); // Germany System.out.println(Country.IT); // Italy System.out.println(Country.US); // United States}