Java Enums find enum.
I've just read tutorial about enums and have one question.
I've studied example:

    public enum Planet {
        MERCURY (3.303e+23, 2.4397e6),
        VENUS   (4.869e+24, 6.0518e6),
        EARTH   (5.976e+24, 6.37814e6),
        MARS    (6.421e+23, 3.3972e6),
        JUPITER (1.9e+27,   7.1492e7),
        SATURN  (5.688e+26, 6.0268e7),
        URANUS  (8.686e+25, 2.5559e7),
        NEPTUNE (1.024e+26, 2.4746e7),
        PLUTO   (1.27e+22,  1.137e6);
    
        private final double mass;   // in kilograms
        private final double radius; // in meters
        Planet(double mass, double radius) {
            this.mass = mass;
            this.radius = radius;
        }
        public double mass()   { return mass; }
        public double radius() { return radius; }
    
        // universal gravitational constant  (m3 kg-1 s-2)
        public static final double G = 6.67300E-11;
    
        public double surfaceGravity() {
            return G * mass / (radius * radius);
        }
        public double surfaceWeight(double otherMass) {
            return otherMass * surfaceGravity();
        }
    }
and question: How can I find enum type for example MERCURY if I know mass and radius ?
Thanks.
Java Enums find enum.
===

I've just read tutorial about enums and have one question.
I've studied example:

    public enum Planet {
        MERCURY (3.303e+23, 2.4397e6),
        VENUS   (4.869e+24, 6.0518e6),
        EARTH   (5.976e+24, 6.37814e6),
        MARS    (6.421e+23, 3.3972e6),
        JUPITER (1.9e+27,   7.1492e7),
        SATURN  (5.688e+26, 6.0268e7),
        URANUS  (8.686e+25, 2.5559e7),
        NEPTUNE (1.024e+26, 2.4746e7),
        PLUTO   (1.27e+22,  1.137e6);
    
        private final double mass;   // in kilograms
        private final double radius; // in meters
        Planet(double mass, double radius) {
            this.mass = mass;
            this.radius = radius;
        }
        public double mass()   { return mass; }
        public double radius() { return radius; }
    
        // universal gravitational constant  (m3 kg-1 s-2)
        public static final double G = 6.67300E-11;
    
        public double surfaceGravity() {
            return G * mass / (radius * radius);
        }
        public double surfaceWeight(double otherMass) {
            return otherMass * surfaceGravity();
        }
    }
and question: How can I find enum type for example MERCURY if I know mass and radius ?
Thanks.