public static void main(String[] args) {
System.out.println("enum as array:");
System.out.println(" " + Arrays.toString(Color.values()) + "\n");
System.out.println("All enum constants:");
for (Color c : Color.values()) {
System.out.println(" " + c.name() + "=" + c.ordinal());
}
System.out.println("\nenum from a String:");
String color = "YELLOW";
Color c = Color.valueOf(color);
System.out.println(
" " + c.name() + "=" + c.ordinal() + " RGB=0x" + Integer.toHexString(c.getRGB()));
System.out.println("\nenum from unknown String:");
String color2 = "yellow";
try {
Color c2 = Color.valueOf(color2); // throws "IllegalArgumentException"
System.out.println(
" " + c2.name() + "=" + c2.ordinal() + " RGB=0x" + Integer.toHexString(c2.getRGB()));
} catch (IllegalArgumentException iae) {
System.out.println(" \"" + color2 + "\" not found in enum.");
}
// Sample of mapping an int to an enum:
EnumSample service = new EnumSample();
switch (Index.valueOf(service.getIndex())) {
case ONE:
System.out.println("ONE");
break;
case TWO:
System.out.println("TWO");
break;
case INVALID:
System.out.println("INVALID");
break;
case REG:
break;
case THREE:
break;
case ZERO:
break;
default:
break;
}
}
