How to reverse enum?

Question

I have an Enum class below

public class PTalkCommand {
public enum Code {
        CLR((byte) 0),
        ACK((byte) 170),
        SER((byte) 0),
        NAK         


        

Answer 1

There's a built-in .values() method that returns an array of all the enum constants. You can iterate it backwards.

Code[] values = Code.values();
for (int i = values.length - 1; i >= 0; i--) {
    Code next = values[i];
    //do your thing
}