如何在JAVA中比较枚举值

enum Color {
    RED, GREEN, BLUE
}

Color color1 = Color.RED;
Color color2 = Color.GREEN;

if (color1 == color2) {
    System.out.println("color1 and color2 are equal");
} else {
    System.out.println("color1 and color2 are not equal");
}

enum Color {
    RED, GREEN, BLUE
}

Color color1 = Color.RED;
Color color2 = Color.GREEN;

if (color1.equals(color2)) {
    System.out.println("color1 and color2 are equal");
} else {
    System.out.println("color1 and color2 are not equal");
}

enum Color {
    RED, GREEN, BLUE
}

Color color1 = Color.RED;
Color color2 = Color.GREEN;

if (color1.compareTo(color2) == 0) {
    System.out.println("color1 and color2 are equal");
} else {
    System.out.println("color1 and color2 are not equal");
}