Java Tutorial/Apache Common/Fraction

Fraction

   <source lang="java">

/*

* ========================================================================
* 
* Copyright 2005 Tim O"Brien.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* 
*   http://www.apache.org/licenses/LICENSE-2.0
* 
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* 
* ========================================================================
*/

import org.apache.rumons.lang.math.Fraction; public class MainClass {

 public static void main(String[] args) {
   Fraction numer1 = Fraction.getFraction( 3, 4 );
   Fraction numer2 = Fraction.getFraction( 51, 3509 );
 
   Fraction numerator = numer1.multiplyBy( numer2 );
   Fraction denominator = Fraction.getFraction( 41, 59 );
 
   Fraction result = numerator.divideBy( denominator );
 
   System.out.println( "Expression as Fraction: " + result.reduce().toString() );
   System.out.println( "Expression as double: " + result.doubleValue() );
   
   Fraction test1 = Fraction.getFraction( 1, 2 );
   Fraction test2 = Fraction.getFraction( 2, 4 );
   
   System.out.println( "1/2 equals 2/4: " + test1.equals( test2 ) );
   
   double value = Fraction.getFraction( 10000, 100000 ).pow( 6 ).doubleValue();
   double reduced = Fraction.getFraction( 10000, 100000 ).reduce().pow( 6 ).doubleValue();
   
   System.out.println( "Fraction to pow 6 without reduction: " + value );
     System.out.println( "Fraction to pow 6 with reduction: " + reduced );
 }

}</source>

Expression as Fraction: 9027/575476
Expression as double: 0.015686145034719084
1/2 equals 2/4: false
Fraction to pow 6 without reduction: 1.0E-6
Fraction to pow 6 with reduction: 1.0E-6