replace code for creating output folder with

Examples.createOutputFolder()

jsprit-examples/src/main/java/jsprit/examples/BicycleMessenger.java

@@ -42,9 +42,7 @@ import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.CrowFlyCosts;
 import jsprit.core.util.Solutions;
-
+import jsprit.util.Examples;
-import org.apache.log4j.Level;
-import org.apache.log4j.Logger;
 
 
 /**
@@ -207,8 +205,8 @@ public class BicycleMessenger {
 	 * @throws IOException 
 	 */
 	public static void main(String[] args) throws IOException {
-		createOutputFolder();//for output generated below
+		Examples.createOutputFolder();
-		Logger.getRootLogger().setLevel(Level.INFO);
+		
 		//build the problem
 		VehicleRoutingProblem.Builder problemBuilder = VehicleRoutingProblem.Builder.newInstance();
 		problemBuilder.setFleetSize(FleetSize.FINITE);
@@ -288,19 +286,6 @@ public class BicycleMessenger {
 		}
 	}
 
-	private static void createOutputFolder() {
-		/*
-		 * some preparation - create output folder
-		 */
-		File dir = new File("output");
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
-	}
-
 	static Map<String,Double> getNearestMessengers(VehicleRoutingTransportCosts routingCosts, Collection<Job> envelopes, Collection<Vehicle> messengers) {
 		Map<String,Double> nearestMessengers = new HashMap<String, Double>();	
 		for(Job envelope : envelopes){

jsprit-examples/src/main/java/jsprit/examples/BuildAlgorithmFromScratch.java

@@ -18,7 +18,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.SolutionPrinter;
@@ -48,6 +47,7 @@ import jsprit.core.problem.vehicle.InfiniteFleetManagerFactory;
 import jsprit.core.problem.vehicle.VehicleFleetManager;
 import jsprit.core.util.Solutions;
 import jsprit.instance.reader.SolomonReader;
+import jsprit.util.Examples;
 
 public class BuildAlgorithmFromScratch {
 
@@ -58,13 +58,7 @@ public class BuildAlgorithmFromScratch {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * Build the problem.

jsprit-examples/src/main/java/jsprit/examples/CompareAlgorithmExample.java

@@ -16,8 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
-
 import jsprit.analysis.toolbox.AlgorithmSearchProgressChartListener;
 import jsprit.analysis.toolbox.StopWatch;
 import jsprit.core.algorithm.VehicleRoutingAlgorithm;
@@ -27,6 +25,7 @@ import jsprit.core.algorithm.listener.VehicleRoutingAlgorithmListeners.Priority;
 import jsprit.core.algorithm.termination.IterationWithoutImprovementTermination;
 import jsprit.core.problem.VehicleRoutingProblem;
 import jsprit.instance.reader.SolomonReader;
+import jsprit.util.Examples;
 
 
 public class CompareAlgorithmExample {
@@ -38,13 +37,7 @@ public class CompareAlgorithmExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		/*
 		 * Build the problem.
 		 * 
@@ -82,14 +75,10 @@ public class CompareAlgorithmExample {
 		vra_withThreshold.searchSolutions();
 		
 		vra_greedy.searchSolutions();	
-		
-		
 		vra_greedy.setPrematureAlgorithmTermination(new IterationWithoutImprovementTermination(40));
 		vra_greedy.searchSolutions();
 	
 		
-		
-		
 	}
 
 }

jsprit-examples/src/main/java/jsprit/examples/ConfigureAlgorithmInCodeInsteadOfPerXml.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.SolutionPlotter;
@@ -35,6 +34,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 import org.apache.commons.configuration.XMLConfiguration;
 
@@ -45,13 +45,7 @@ public class ConfigureAlgorithmInCodeInsteadOfPerXml {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * get a vehicle type-builder and build a type with the typeId "vehicleType" and a capacity of 2

jsprit-examples/src/main/java/jsprit/examples/CostMatrixExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.SolutionPlotter;
@@ -34,6 +33,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Solutions;
 import jsprit.core.util.VehicleRoutingTransportCostsMatrix;
+import jsprit.util.Examples;
 
 
 /**
@@ -51,13 +51,8 @@ public class CostMatrixExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
+		
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		VehicleType type = VehicleTypeImpl.Builder.newInstance("type", 2).setCostPerDistance(1).setCostPerTime(2).build();
 		Vehicle vehicle = VehicleImpl.Builder.newInstance("vehicle").setLocationId("0").setType(type).build();
 		

jsprit-examples/src/main/java/jsprit/examples/HVRPBenchmarkExample.java

@@ -34,6 +34,7 @@ public class HVRPBenchmarkExample {
 	
 	public static void main(String[] args) {
 		Examples.createOutputFolder();
+		
 		VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
 		//read modified Golden-instance, you can find all relevant instances in jsprit-instances/instances/vrph
 		//you can build various problems, see VrphType doc for more details

jsprit-examples/src/main/java/jsprit/examples/MultipleDepotExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Arrays;
 import java.util.Collection;
 
@@ -37,6 +36,7 @@ import jsprit.core.problem.vehicle.VehicleImpl;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 
 public class MultipleDepotExample {
@@ -48,13 +48,8 @@ public class MultipleDepotExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
+		
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
 		/*
 		 * Read cordeau-instance p01, BUT only its services without any vehicles 

jsprit-examples/src/main/java/jsprit/examples/MultipleDepotExampleWithPenaltyVehicles.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Arrays;
 import java.util.Collection;
 
@@ -24,8 +23,8 @@ import jsprit.analysis.toolbox.AlgorithmSearchProgressChartListener;
 import jsprit.analysis.toolbox.GraphStreamViewer;
 import jsprit.analysis.toolbox.SolutionPlotter;
 import jsprit.analysis.toolbox.SolutionPrinter;
-import jsprit.analysis.toolbox.StopWatch;
 import jsprit.analysis.toolbox.SolutionPrinter.Print;
+import jsprit.analysis.toolbox.StopWatch;
 import jsprit.core.algorithm.VehicleRoutingAlgorithm;
 import jsprit.core.algorithm.io.VehicleRoutingAlgorithms;
 import jsprit.core.algorithm.listener.VehicleRoutingAlgorithmListeners.Priority;
@@ -40,6 +39,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 
 public class MultipleDepotExampleWithPenaltyVehicles {
@@ -51,13 +51,7 @@ public class MultipleDepotExampleWithPenaltyVehicles {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
 		/*

jsprit-examples/src/main/java/jsprit/examples/PickupAndDeliveryExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.AlgorithmSearchProgressChartListener;
@@ -30,6 +29,7 @@ import jsprit.core.algorithm.selector.SelectBest;
 import jsprit.core.problem.VehicleRoutingProblem;
 import jsprit.core.problem.io.VrpXMLReader;
 import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
+import jsprit.util.Examples;
 
 
 public class PickupAndDeliveryExample {
@@ -39,13 +39,7 @@ public class PickupAndDeliveryExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * Build the problem.

jsprit-examples/src/main/java/jsprit/examples/PickupAndDeliveryExample2.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.AlgorithmSearchProgressChartListener;
@@ -31,6 +30,7 @@ import jsprit.core.algorithm.selector.SelectBest;
 import jsprit.core.problem.VehicleRoutingProblem;
 import jsprit.core.problem.io.VrpXMLReader;
 import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
+import jsprit.util.Examples;
 
 import org.apache.log4j.Level;
 import org.apache.log4j.Logger;
@@ -45,13 +45,7 @@ public class PickupAndDeliveryExample2 {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * Build the problem.

jsprit-examples/src/main/java/jsprit/examples/PickupAndDeliveryOpenExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.AlgorithmSearchProgressChartListener;
@@ -29,6 +28,7 @@ import jsprit.core.algorithm.selector.SelectBest;
 import jsprit.core.problem.VehicleRoutingProblem;
 import jsprit.core.problem.io.VrpXMLReader;
 import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
+import jsprit.util.Examples;
 
 
 public class PickupAndDeliveryOpenExample {
@@ -38,13 +38,7 @@ public class PickupAndDeliveryOpenExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * Build the problem.

jsprit-examples/src/main/java/jsprit/examples/RefuseCollectionExample.java

@@ -41,6 +41,7 @@ import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Solutions;
 import jsprit.core.util.VehicleRoutingTransportCostsMatrix;
 import jsprit.core.util.VehicleRoutingTransportCostsMatrix.Builder;
+import jsprit.util.Examples;
 
 
 
@@ -154,13 +155,7 @@ public class RefuseCollectionExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * create vehicle-type and vehicle

jsprit-examples/src/main/java/jsprit/examples/SimpleDepotBoundedPickupAndDeliveryExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.Plotter;
@@ -36,6 +35,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 
 public class SimpleDepotBoundedPickupAndDeliveryExample {
@@ -44,13 +44,7 @@ public class SimpleDepotBoundedPickupAndDeliveryExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * get a vehicle type-builder and build a type with the typeId "vehicleType" and a capacity of 2

jsprit-examples/src/main/java/jsprit/examples/SimpleEnRoutePickupAndDeliveryExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Arrays;
 import java.util.Collection;
 
@@ -36,6 +35,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 
 public class SimpleEnRoutePickupAndDeliveryExample {
@@ -44,13 +44,7 @@ public class SimpleEnRoutePickupAndDeliveryExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * get a vehicle type-builder and build a type with the typeId "vehicleType" and a capacity of 2

jsprit-examples/src/main/java/jsprit/examples/SimpleEnRoutePickupAndDeliveryOpenRoutesExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.GraphStreamViewer;
@@ -36,6 +35,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 
 public class SimpleEnRoutePickupAndDeliveryOpenRoutesExample {
@@ -44,13 +44,7 @@ public class SimpleEnRoutePickupAndDeliveryOpenRoutesExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * get a vehicle type-builder and build a type with the typeId "vehicleType" and a capacity of 2

jsprit-examples/src/main/java/jsprit/examples/SimpleEnRoutePickupAndDeliveryWithDepotBoundedDeliveriesExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.Plotter;
@@ -36,6 +35,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 
 public class SimpleEnRoutePickupAndDeliveryWithDepotBoundedDeliveriesExample {
@@ -44,13 +44,7 @@ public class SimpleEnRoutePickupAndDeliveryWithDepotBoundedDeliveriesExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * get a vehicle type-builder and build a type with the typeId "vehicleType" and a capacity of 2

jsprit-examples/src/main/java/jsprit/examples/SimpleExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.GraphStreamViewer;
@@ -36,6 +35,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 
 public class SimpleExample {
@@ -44,13 +44,7 @@ public class SimpleExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * get a vehicle type-builder and build a type with the typeId "vehicleType" and a capacity of 2

jsprit-examples/src/main/java/jsprit/examples/SimpleExampleOpenRoutes.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.SolutionPlotter;
@@ -34,6 +33,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 
 public class SimpleExampleOpenRoutes {
@@ -42,13 +42,7 @@ public class SimpleExampleOpenRoutes {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * get a vehicle type-builder and build a type with the typeId "vehicleType" and a capacity of 2

jsprit-examples/src/main/java/jsprit/examples/SimpleVRPWithBackhaulsExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.Plotter;
@@ -37,6 +36,7 @@ import jsprit.core.problem.vehicle.VehicleType;
 import jsprit.core.problem.vehicle.VehicleTypeImpl;
 import jsprit.core.util.Coordinate;
 import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
 
 
 public class SimpleVRPWithBackhaulsExample {
@@ -45,13 +45,7 @@ public class SimpleVRPWithBackhaulsExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * get a vehicle type-builder and build a type with the typeId "vehicleType" and a capacity of 2

jsprit-examples/src/main/java/jsprit/examples/SolomonExample.java

@@ -16,14 +16,13 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.GraphStreamViewer;
+import jsprit.analysis.toolbox.GraphStreamViewer.Label;
 import jsprit.analysis.toolbox.Plotter;
 import jsprit.analysis.toolbox.SolutionPlotter;
 import jsprit.analysis.toolbox.SolutionPrinter;
-import jsprit.analysis.toolbox.GraphStreamViewer.Label;
 import jsprit.analysis.toolbox.SolutionPrinter.Print;
 import jsprit.core.algorithm.VehicleRoutingAlgorithm;
 import jsprit.core.algorithm.io.VehicleRoutingAlgorithms;
@@ -31,6 +30,7 @@ import jsprit.core.algorithm.selector.SelectBest;
 import jsprit.core.problem.VehicleRoutingProblem;
 import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
 import jsprit.instance.reader.SolomonReader;
+import jsprit.util.Examples;
 
 
 public class SolomonExample {
@@ -39,13 +39,7 @@ public class SolomonExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * Build the problem.

jsprit-examples/src/main/java/jsprit/examples/SolomonOpenExample.java

@@ -16,19 +16,19 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.GraphStreamViewer;
+import jsprit.analysis.toolbox.GraphStreamViewer.Label;
 import jsprit.analysis.toolbox.SolutionPlotter;
 import jsprit.analysis.toolbox.SolutionPrinter;
-import jsprit.analysis.toolbox.GraphStreamViewer.Label;
 import jsprit.core.algorithm.VehicleRoutingAlgorithm;
 import jsprit.core.algorithm.io.VehicleRoutingAlgorithms;
 import jsprit.core.algorithm.selector.SelectBest;
 import jsprit.core.problem.VehicleRoutingProblem;
 import jsprit.core.problem.io.VrpXMLReader;
 import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
+import jsprit.util.Examples;
 
 
 public class SolomonOpenExample {
@@ -37,13 +37,7 @@ public class SolomonOpenExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * Build the problem.

jsprit-examples/src/main/java/jsprit/examples/SolomonR101Example.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.SolutionPlotter;
@@ -27,6 +26,7 @@ import jsprit.core.algorithm.selector.SelectBest;
 import jsprit.core.problem.VehicleRoutingProblem;
 import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
 import jsprit.instance.reader.SolomonReader;
+import jsprit.util.Examples;
 
 
 public class SolomonR101Example {
@@ -35,13 +35,7 @@ public class SolomonR101Example {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * Build the problem.

jsprit-examples/src/main/java/jsprit/examples/VRPWithBackhaulsExample.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.AlgorithmSearchProgressChartListener;
@@ -30,6 +29,7 @@ import jsprit.core.problem.VehicleRoutingProblem;
 import jsprit.core.problem.constraint.ServiceDeliveriesFirstConstraint;
 import jsprit.core.problem.io.VrpXMLReader;
 import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
+import jsprit.util.Examples;
 
 
 public class VRPWithBackhaulsExample {
@@ -39,13 +39,7 @@ public class VRPWithBackhaulsExample {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * Build the problem.

jsprit-examples/src/main/java/jsprit/examples/VRPWithBackhaulsExample2.java

@@ -16,7 +16,6 @@
  ******************************************************************************/
 package jsprit.examples;
 
-import java.io.File;
 import java.util.Collection;
 
 import jsprit.analysis.toolbox.Plotter;
@@ -30,6 +29,7 @@ import jsprit.core.problem.VehicleRoutingProblem;
 import jsprit.core.problem.constraint.ServiceDeliveriesFirstConstraint;
 import jsprit.core.problem.io.VrpXMLReader;
 import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
+import jsprit.util.Examples;
 
 
 public class VRPWithBackhaulsExample2 {
@@ -39,13 +39,7 @@ public class VRPWithBackhaulsExample2 {
 		/*
 		 * some preparation - create output folder
 		 */
-		File dir = new File("output");
+		Examples.createOutputFolder();
-		// if the directory does not exist, create it
-		if (!dir.exists()){
-			System.out.println("creating directory ./output");
-			boolean result = dir.mkdir();  
-			if(result) System.out.println("./output created");  
-		}
 		
 		/*
 		 * Build the problem.