Command Parser.

pom.xml

@@ -4,7 +4,7 @@
   <groupId>com.loomcom.j6502</groupId>
   <artifactId>j6502</artifactId>
   <packaging>jar</packaging>
-  <version>1.0-SNAPSHOT</version>
+  <version>0.1.0</version>
   <name>j6502</name>
   <url>http://www.loomcom.com/j6502</url>
   <dependencies>
@@ -15,4 +15,27 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
+  
+  <build>
+    <plugins>
+      <!-- Set up Main-Class in the JAR manifest -->
+      <plugin>
+	<groupId>org.apache.maven.plugins</groupId>
+	<artifactId>maven-jar-plugin</artifactId>
+	<configuration>
+	  <archive>
+	    <manifest>
+	      <mainClass>com.loomcom.j6502.Control</mainClass>
+	      <packageName>com.loomcom.j6502</packageName>
+	    </manifest>
+	    <manifestEntries>
+	      <mode>development</mode>
+	      <url>${pom.url}</url>
+	    </manifestEntries>
+	  </archive>
+	</configuration>
+      </plugin>
+    </plugins>
+  </build>
+
 </project>

src/main/java/com/loomcom/j6502/CommandParser.java

@@ -0,0 +1,70 @@
+package com.loomcom.j6502;
+
+import java.io.*;
+
+public class CommandParser {
+    
+    private BufferedReader m_in;
+    private BufferedWriter m_out;
+    
+    public CommandParser(InputStream in, OutputStream out) {
+	m_in  = new BufferedReader(new InputStreamReader(in));
+	m_out = new BufferedWriter(new OutputStreamWriter(out));
+    }
+
+    public void run() {
+	try {
+	    String command = null;
+	    greeting();
+	    prompt();
+	    while (!shouldQuit(command = readLine())) {
+		dispatch(command);
+		prompt();
+	    }
+	    writeLine("Goodbye!");
+	} catch (IOException ex) {
+	    System.err.println("Error: " + ex.toString());
+	    System.exit(1);
+	}
+    }
+    
+    /**
+     * Dispatch the command.
+     */
+    public void dispatch(String command) throws IOException {
+	writeLine("You entered: " + command);
+    }
+
+    /*******************************************************************
+     * Private
+     *******************************************************************/
+
+    private void greeting() throws IOException {
+	writeLine("Welcome to the j6502 Simulator!");
+    }
+
+    private void prompt() throws IOException {
+	m_out.write("> ");
+	m_out.flush();
+    }
+
+    private String readLine() throws IOException {
+	String line = m_in.readLine();
+	if (line == null) { return null; }
+	return line.trim();
+    }
+
+    private void writeLine(String line) throws IOException {
+	m_out.write(line);
+	m_out.newLine();
+	m_out.flush();
+    }
+    
+    /**
+     * Returns true if the line is a quit.
+     */
+    private boolean shouldQuit(String line) {
+	return (line == null || "q".equals(line.toLowerCase()));
+    }
+    
+}

src/main/java/com/loomcom/j6502/Control.java

@@ -1,11 +1,17 @@
 package com.loomcom.j6502;
 
+import java.io.IOException;
+
 /**
  * Main control class for the J6502 Simulator.
  */
 public class Control {
+
     public static void main(String[] args) {
-	System.out.println("Hello, world!");
+
+	CommandParser parser = new CommandParser(System.in, System.out);
+	parser.run();
+
     }
 
 }