enum ColorE {
    RED, GREEN, BLUE;
}

public class GetEnumContent {
    public static void main(String[] args) {
        // ColorE color=ColorE.BLUE;
        // System.out.println(color);
//        for (ColorE c : ColorE.values()) {
//            System.out.println(c);
//        }
        for(ColorE c:ColorE.values()){
            print(c);
        }
    }

    public static void print(ColorE color) {
        switch (color) {
        case RED: {
            System.out.println("I AM RRRRRRRRRED.");
            break;
        }
        case GREEN: {
            System.out.println("I AM GRREN.");
            break;
        }
        case BLUE: {
            System.out.println("I AM BLLLUUUE.");
            break;
        }
        default: {
            System.out.println("I DONT KOWN THIS COLOR.");
            break;
        }
        }
    }
}

Enum基础