Java runner

Java/pom.xml

@@ -0,0 +1,50 @@
+<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>com.mycompany.app</groupId>
+  <artifactId>gilded-rose</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <properties>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <maven.compiler.target>1.8</maven.compiler.target>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.12</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>exec-maven-plugin</artifactId>
+        <version>1.6.0</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>exec</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+          <mainClass>com.gildedrose.Runner</mainClass>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <source>8</source>
+          <target>8</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>

Java/src/main/java/com/gildedrose/Runner.java

@@ -0,0 +1,55 @@
+package com.gildedrose;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class Runner {
+    private static Item itemFromLine(String itemLine) {
+        String[] pieces = itemLine.split("__");
+        return new Item(pieces[0], Integer.parseInt(pieces[1]), Integer.parseInt(pieces[2]));
+    }
+
+    public static void main(String[] args) {
+        if (args.length < 2) {
+            System.out.println("Please pass in and out file args");
+            System.exit(1);
+        }
+
+        String inFile = args[0];
+        String outFile = args[1];
+
+        System.out.println("Reading from: " + inFile + ".  Writing to: " + outFile);
+
+        Item[] items = null;
+
+        try (Stream<String> stream = Files.lines(Paths.get(inFile))) {
+            items = stream.filter(s -> !(s.isEmpty() || s.startsWith(";")))
+                    .map(Runner::itemFromLine)
+                    .toArray(Item[]::new);
+        } catch (IOException e) {
+            System.out.println("Error reading infile: " + inFile);
+            System.exit(1);
+        }
+
+        GildedRose gildedRose = new GildedRose(items);
+        gildedRose.updateQuality();
+
+        String outString = Stream.of(gildedRose.items)
+                .map(item -> String.join("__",
+                        item.name,
+                        Integer.toString(item.sellIn),
+                        Integer.toString(item.quality)))
+                .collect(Collectors.joining("\n"));
+
+        try {
+            Files.write(Paths.get(outFile), outString.getBytes(StandardCharsets.US_ASCII));
+        } catch (IOException e) {
+            System.out.println("Error writing outfile: " + outFile);
+            System.exit(1);
+        }
+    }
+}