/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* A typesafe enumeration for describing mathematical operators.
*
* @author Brian Doherty
* @since 1.5
*/
public abstract class Operator {
}
protected abstract double eval(double x, double y);
/* Operator '+' */
protected double eval(double x, double y) {
return x + y;
}
};
/* Operator '-' */
protected double eval(double x, double y) {
return x - y;
}
};
/* Operator '/' */
protected double eval(double x, double y) {
if (y == 0) {
}
return x / y;
}
};
/* Operator '*' */
protected double eval(double x, double y) {
return x * y;
}
};
/**
* Returns the string representation of this Operator object.
*
* @return the string representation of this Operator object
*/
return name;
}
/**
* Maps a string to its corresponding Operator object.
*
* @param s an string to match against Operator objects.
* @return The Operator object matching the given string.
*/
}
/**
* Returns an enumeration of the keys for this enumerated type
*
* @param s an string to match against Operator objects.
* @return The Operator object matching the given string.
*/
}
}