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Thermodynamics properties and equilibria calculations for chemical engineering.
There is a newer version: 3.5
//package termo.equilibrium;
//
//import java.util.ArrayList;
//import java.util.HashMap;
//import termo.binaryParameter.BinaryInteractionParameter;
//import termo.component.Component;
//import termo.eos.Cubic;
//
///**
// *
// * @author Hugo Redon Rivera
// */
//public  abstract class  PhaseEquilibria {
//     public abstract EquilibriaPhaseSolution getTemperature(
//             double temperatureEstimate,
//              double pressureEstimate, 
//              ArrayList components,
//              HashMap mixtureFractionsZ, 
//              HashMap estimationFractions,
//              Cubic eos,
//              BinaryInteractionParameter kinteraction,
//              double tolerance);
//    
//    public EquilibriaPhaseSolution getTemperature(
//            double pressure,
//            HashMap mixtureFracions,
//            ArrayList components,
//            Cubic eos,
//            BinaryInteractionParameter kinteraction,
//            double tolerance
//            ){
//        
//       EquilibriaPhaseSolution estimate =  getTemperatureEstimate(pressure, mixtureFracions);
//        return getTemperature(estimate, components, eos, kinteraction, tolerance);
//    }
//  
//    public EquilibriaPhaseSolution getTemperature(
//            EquilibriaPhaseSolution estimate,
//            ArrayList components,
//            Cubic eos,
//            BinaryInteractionParameter kinteraction,
//            double tolerance
//            ){
//        double temperature = estimate.getTemperature();
//        double pressure =estimate.getPressure();
//        HashMap liquidFractions = estimate.getMixtureFractions();
//        HashMap vaporFractions = estimate.getSolutionFractions();
//        
//        
//       return  getTemperature(temperature, pressure, components, liquidFractions, vaporFractions, eos, kinteraction, tolerance);
//    }
//    
//     public abstract EquilibriaPhaseSolution getPressure(double temperature,
//             double pressure,
//            ArrayList components,
//            HashMap mixtureFractionsZ,
//            HashMap estimationFractions, 
//            Cubic eos,
//            BinaryInteractionParameter kinteraction,
//            double tolerance);
//     
//      private EquilibriaPhaseSolution getPressure(double temperature, 
//              HashMap mixtureFractions, 
//              ArrayList components2, 
//              Cubic cubic, 
//              BinaryInteractionParameter kinteraction, 
//              double tol) {
//          
//          EquilibriaPhaseSolution estimate = getPressureEstimate(temperature, mixtureFractions);
//          return getPressure(temperature, estimate, components2, cubic, kinteraction, tol);
//    }
//
//      
//           private EquilibriaPhaseSolution getPressure(double temperature, 
//                   EquilibriaPhaseSolution estimate,
//                ArrayList components,
//               Cubic eos,
//                BinaryInteractionParameter kinteraction,
//              double tolerance
//            ){
//               double pressure = estimate.getPressure();
//               HashMap mixtureFractions = estimate.getMixtureFractions();
//               HashMap solutionFractions = estimate.getSolutionFractions();
//               
//               return getPressure(temperature, pressure, components, mixtureFractions, solutionFractions, eos, kinteraction, tolerance);
//           }
//     
//       public abstract EquilibriaPhaseSolution getPressureEstimate(
//            double temperature,
//            HashMap mixtureFractionsZ
//          );
//       public abstract EquilibriaPhaseSolution getTemperatureEstimate(
//               double pressure,
//                HashMap mixtureFractionsZ
//          );
//       
// 
//     public ArrayList getTemperatureDiagram(
//            double pressure, 
//            Component component1,
//            Component component2, 
//            BinaryInteractionParameter kinteraction,
//            Cubic eos,
//            double tolerance) {
//        return getTemperatureDiagram(pressure, component1,component2, kinteraction, eos,101, tolerance);
//    
//}
////Todo getTemperatureDiagram getPresureDiagram seems to be repetitive
//    
//     public ArrayList getTemperatureDiagram(
//             double pressure, 
//             Component component1,
//             Component component2,
//             BinaryInteractionParameter kinteraction, 
//             Cubic eos, 
//             int numberCalculations,
//             double tolerance) {
//         ArrayList components2 = new ArrayList<>();
//         components2.add(component1);
//         components2.add(component2);
//        
//        
//        ArrayList result = new ArrayList<>();
//        
//        double step = 1d / numberCalculations;
//        
//        for(double i= 0; i <= 1; i += step){
//            HashMap mixtureFracions = new HashMap<>();
//            mixtureFracions.put(component1, i);
//            mixtureFracions.put(component2, 1-i);
//            
//            result.add(getTemperature(pressure, mixtureFracions, components2,eos , kinteraction, tolerance));
//           
//        }
//
//        return result;
//        
//    }
//
//    public ArrayList getPressureDiagram(double temperature, 
//            Component component1,
//            Component component2, 
//            BinaryInteractionParameter kinteraction, 
//            Cubic cubic, 
//            int numberCalculations,
//            double tol
//            ) {
//             ArrayList components2 = new ArrayList<>();
//         components2.add(component1);
//         components2.add(component2);
//        
//        
//        ArrayList result = new ArrayList<>();
//        
//        double step = 1d / numberCalculations;
//        
//        for(double i= 0; i <= 1; i += step){
//            HashMap solutionFractions = new HashMap<>();
//            solutionFractions.put(component1, i);
//            solutionFractions.put(component2, 1-i);
//            
//            result.add(getPressure(temperature, solutionFractions, components2,cubic , kinteraction, tol));
//           
//        }
//        return result;
//    }
//       public ArrayList getPressureDiagram(double temperature, 
//            Component component1,
//            Component component2, 
//            BinaryInteractionParameter kinteraction, 
//            Cubic cubic, 
//            double tol
//            ) {
//           return getPressureDiagram(temperature, component1, component2, kinteraction, cubic, 101, tol);
//       }
//
//   
//       
//       public ArrayList getPhaseEnvelope(
//               ArrayList components,
//               HashMap mixtureFractions,
//               BinaryInteractionParameter kinteraction,
//               Cubic cubic,
//               double tol
//               ){
//           ArrayList phaseEnvelope = new ArrayList<>();
//           
//          
//           
//           return phaseEnvelope;
//       }
//}