Switch to maven and Java 1.6

.gitignore

@@ -1,3 +1,3 @@
 .idea/
 *.iml
-/out
+/target

pom.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>de.uni_luebeck.isp</groupId>
+    <artifactId>WhileInterpreter</artifactId>
+    <version>1.0</version>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.6.0</version>
+                <configuration>
+                    <source>1.6</source>
+                    <target>1.6</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+        </dependency>
+    </dependencies>
+</project>

src/interpreter/Evaluator.java → src/main/java/interpreter/Evaluator.java

@@ -8,7 +8,7 @@ import java.util.Map;
 public class Evaluator extends Visitor<Integer> {
 
     final Expression expression;
-    final Map<String, Integer> valuation = new HashMap<>();
+    final Map<String, Integer> valuation = new HashMap<String, Integer>();
 
     public Evaluator(Expression expression, Map<String, Integer> valuation) {
         this.expression = expression;

src/interpreter/Interpreter.java → src/main/java/interpreter/Interpreter.java

@@ -7,10 +7,10 @@ import java.util.Map;
 
 public class Interpreter extends Visitor {
     final Program program;
-    final Map<String, Integer> valuation = new HashMap<>();
+    final Map<String, Integer> valuation = new HashMap<String, Integer>();
 
     public Map<String, Integer> getValuation() {
-        Map<String, Integer> result = new HashMap<>();
+        Map<String, Integer> result = new HashMap<String, Integer>();
         result.putAll(valuation);
         return result;
     }

src/parser/Parser.java → src/main/java/parser/Parser.java

@@ -28,7 +28,7 @@ public class Parser {
 
     Program program() {
         Program firstStatement = statement();
-        List<Program> moreStatements = new ArrayList<>();
+        List<Program> moreStatements = new ArrayList<Program>();
         while (test(";")) {
             consume(";");
             Program statement = statement();
@@ -148,7 +148,7 @@ public class Parser {
 
     Expression expression() {
         Expression firstAtom = atom();
-        List<OperatorWithExpression> moreAtoms = new ArrayList<>();
+        List<OperatorWithExpression> moreAtoms = new ArrayList<OperatorWithExpression>();
         while(testOperator()) {
             Operator operator = operator();
             Expression expression = atom();

test/interpreter/EvaluatorTest.java → src/test/java/interpreter/EvaluatorTest.java

@@ -11,7 +11,7 @@ import static org.junit.Assert.assertEquals;
 public class EvaluatorTest {
     @Test
     public void testEval() {
-        Map<String, Integer> valuation = new HashMap<>();
+        Map<String, Integer> valuation = new HashMap<String, Integer>();
         valuation.put("x", 7);
         valuation.put("y", 2);
         Expression expression = new Addition(new Identifier("x"), new Subtraction(new Identifier("y"), new Int(-4)));