Enums – constant specific methods

• public enum Operation {

• PLUS {double eval(double x, double y) {return x+y;}},

• MINUS {double eval(double x, double y) {return x-y;}},

• TIMES {double eval(double x, double y) {return x*y;}},

• DIVIDE{double eval(double x, double y) {return x/y;}};

• // Do arithmetic op represented by this constant

• abstract double eval(double x, double y);

• }

• // usage

• Double result = Operation.MINUS.eval(3.0, 2.0);