diff --git a/AlgebraicDataflowArchitectureModel/.classpath b/AlgebraicDataflowArchitectureModel/.classpath
index d13e158..58dc636 100644
--- a/AlgebraicDataflowArchitectureModel/.classpath
+++ b/AlgebraicDataflowArchitectureModel/.classpath
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-13">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jdk-13">
 		<attributes>
 			<attribute name="module" value="true"/>
 		</attributes>
diff --git a/AlgebraicDataflowArchitectureModel/src/algorithms/JavaCodeGenerator.java b/AlgebraicDataflowArchitectureModel/src/algorithms/JavaCodeGenerator.java
index 94d3caf..c84b252 100644
--- a/AlgebraicDataflowArchitectureModel/src/algorithms/JavaCodeGenerator.java
+++ b/AlgebraicDataflowArchitectureModel/src/algorithms/JavaCodeGenerator.java
@@ -1,10 +1,12 @@
 package algorithms;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
+
 import code.ast.Block;
 import code.ast.CompilationUnit;
 import code.ast.FieldDeclaration;
@@ -242,6 +244,28 @@
 			codes.add(cu);
 		}
 		
+		// Declare the Pair class.
+		TypeDeclaration type = new TypeDeclaration("Pair");
+		type.addField(new FieldDeclaration(new Type("Double","double"), "first"));
+		type.addField(new FieldDeclaration(new Type("Double","double"), "second"));
+		
+		for(FieldDeclaration field : type.getFields()) {
+			MethodDeclaration getter = new MethodDeclaration(
+					"get" + field.getName().substring(0,1).toUpperCase() + field.getName().substring(1),
+					new Type("Double","double"));
+			getter.setBody(new Block());
+			getter.getBody().addStatement("return " + field.getName() + ";");
+			type.addMethod(getter);
+		}
+		
+		CompilationUnit cu = new CompilationUnit(type);
+		cu.addImport(new ImportDeclaration("java.util.*"));
+		codes.add(cu);
+				
+		
+		
+		
+		
 		// Declare getter methods in the main type.
 		for (Node n : graph.getNodes()) {
 			ResourceNode rn = (ResourceNode) n;