Fixes mistakes and adds comments

Main.java

@@ -2,48 +2,98 @@ import java.lang.Runtime;
 import java.util.ArrayList;
 import java.net.URL;
 import java.util.Scanner;
+import java.io.InputStream;
+import java.io.IOException;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.*;
+import java.net.MalformedURLException;
 public class Main {
-	public ArrayList<Server> servers = new ArrayList<Server>();
-	public ArrayList<ServerType> serverTypes = new ArrayList<ServerType>();
+	public static ArrayList<Server> servers = new ArrayList<Server>();
+	public static ArrayList<ServerType> serverTypes = new ArrayList<ServerType>();
 	
-	private final BASEURL = "https://knarcraft.net/Api/Download/bungeeminecraftserverlauncher/jars";
-	private final BUKKITURL = BASEURL + "/Bukkit/";
-	private final MCPCURL = BASEURL + "/MCPC+/";
-	private final SPIGOT = BASEURL + "/Spigot/";
+	final String BASEURL = "https://knarcraft.net/Api/Download/bungeeminecraftserverlauncher/jars"; //The url we download jar files from.
+	final String BUKKITURL = BASEURL + "/Bukkit/";
+	final String MCPCURL = BASEURL + "/MCPC+/";
+	final String SPIGOT = BASEURL + "/Spigot/";
 	
 	public static void main(String[] args) {
 		addServerTypes();
 	}
 	
+	/**
+	 * Adds all the valid server types and versions.
+	 */
 	public static void addServerTypes() {
-		serverTypes.add(new ServerType("Vanilla", {"Latest", "1.12", "1.11.2", "1.10.2", "1.9.4", "1.8.9", "1.7.10", "1.6.4", "1.5.2", "1.4.7", "1.3.2", "1.2.5"}));
-		serverTypes.add(new ServerType("Snapshot", {"Latest"}));
-		serverTypes.add(new ServerType("SpongeVanilla", {"1.11.2", "1.10.2", "1.8.9"}));
-		serverTypes.add(new ServerType("Spigot", {"1.12", "1.11.2", "1.10.2", "1.9.4", "1.9", "1.8.8", "1.7.10", "1.6.4", "1.5.2", "1.4.7"}));
-		serverTypes.add(new ServerType("MCPCplus", {"1.6.4", "1.6.2", "1.5.2", "1.4.7"}));
-		serverTypes.add(new ServerType("Craftbukkit", {"1.12", "1.11.2", "1.10.2", "1.9.4", "1.8.8", "1.7.10", "1.6.4", "1.5.2", "1.4.6", "1.3.2", "1.2.5", "1.1", "1.0"}));
-		serverTypes.add(new ServerType("Custom", {""}));
+		//This could be changed to read from a list which is downloaded to the user's computer.
+		serverTypes.add(new ServerType("Vanilla", new String[]{"Latest", "1.12", "1.11.2", "1.10.2", "1.9.4", "1.8.9", "1.7.10", "1.6.4", "1.5.2", "1.4.7", "1.3.2", "1.2.5"}));
+		serverTypes.add(new ServerType("Snapshot", new String[]{"Latest"}));
+		serverTypes.add(new ServerType("SpongeVanilla", new String[]{"1.11.2", "1.10.2", "1.8.9"}));
+		serverTypes.add(new ServerType("Spigot", new String[]{"1.12", "1.11.2", "1.10.2", "1.9.4", "1.9", "1.8.8", "1.7.10", "1.6.4", "1.5.2", "1.4.7"}));
+		serverTypes.add(new ServerType("MCPCplus", new String[]{"1.6.4", "1.6.2", "1.5.2", "1.4.7"}));
+		serverTypes.add(new ServerType("Craftbukkit", new String[]{"1.12", "1.11.2", "1.10.2", "1.9.4", "1.8.8", "1.7.10", "1.6.4", "1.5.2", "1.4.6", "1.3.2", "1.2.5", "1.1", "1.0"}));
+		serverTypes.add(new ServerType("Custom", new String[]{""}));
 	}
 	
+	/**
+	 * Runs all enabled servers with their settings.
+	 */
 	public static void startServers() {
+		//This should update the server status to running. The output should display in a custom commandline interface.
 		for (Server server : servers) {
 			if (server.isEnabled()) {
 				String path = server.getPath();
 				String type = server.getType();
 				String ram = server.maxRam();
 				Runtime rt = Runtime.getRuntime();
-				Process pr = rt.exec("java -Xmx" + ram + " -Xms512M -jar " + '"' + path + "\\" + type + '" nogui');
+				try {
+					Process pr = rt.exec("java -Xmx" + ram + " -Xms512M -jar " + "\"" + path + "\\" + type + "\" nogui");
+					long pid = pr.pid();
+					server.updatePid(pid);
+					System.out.println("Success");
+				} catch (IOException e) {
+					System.out.println(e);
+				}
 			}
 		}
 	}
 	
-	public static void readFile(String path) {
+	/**
+	 * Reads the first line of a file from a website.
+	 * This is used to find the newest version of the software.
+	 *
+	 * @param path	The full url of the file to read.
+	 * @return		True if successfull. False otherwise.
+	 */
+	public static boolean readFile(String path) {
+		//We might need to change this to look for specific lines in the file to find vanilla and snapshot versions.
+		//The version should probably be returned. Empty or null on failiure.
 		try {
 			URL url = new URL(path);
 			Scanner s = new Scanner(url.openStream());
 			System.out.println(s.next());
-		} catch (java.io.IOException e) {
+			return true;
+		} catch (IOException e) {
 			System.out.println(e);
+			return false;
+		}
+	}
+	
+	/**
+	 * Downloads a file from a website.
+	 *
+	 * @param path		The full url of the file to download.
+	 * @param outfile	The file to save to.
+	 * @return			True if successful. False otherwise.
+	 */
+	public static boolean downloadFile(String path, Path outfile) {
+		try {
+			URL url = new URL("https://knarcraft.net/Api/View/Jawns/Jawns%20instructions.txt");
+			InputStream in = url.openStream();
+			Files.copy(in, outfile, StandardCopyOption.REPLACE_EXISTING);
+			return true;
+		} catch (IOException e) {
+			System.out.println(e);
+			return false;
 		}
 	}
 }

Server.java

@@ -1,6 +1,7 @@
 import java.util.ArrayList;
+//Contains all necessary information to create, run and manage a Minecraft server.
 public class Server {
-	private static String[17] ramList = {"512M", "1G", "2G", "3G", "4G", "5G", "6G", "7G", "8G", "9G", "10G", "11G", "12G", "13G", "14G", "15G", "16G"};
+	private static String[] ramList = {"512M", "1G", "2G", "3G", "4G", "5G", "6G", "7G", "8G", "9G", "10G", "11G", "12G", "13G", "14G", "15G", "16G"};
 	private String name;
 	private String path;
 	private boolean enabled;
@@ -8,15 +9,17 @@ public class Server {
 	private ServerType type;
 	private String serverVersion;
 	private String maxRam;
+	private long pid;
 	
 	public Server(String name) {
 		this.name = name;
 		this.path = "";
-		this.isEnabled = false;
+		this.enabled = false;
 		this.playerList = new ArrayList<String>();
 		this.type = null;
 		this.serverVersion = null;
 		this.maxRam = ramList[0];
+		this.pid = -1;
 	}
 	
 	public void addPlayer(String name) {
@@ -37,7 +40,7 @@ public class Server {
 	}
 	
 	public String getType() {
-		return this.type.getName() + this.version;
+		return this.type.getName() + this.serverVersion;
 	}
 	
 	public boolean isEnabled() {
@@ -47,4 +50,8 @@ public class Server {
 	public String maxRam() {
 		return this.maxRam;
 	}
+	
+	public void updatePid(long pid) {
+		this.pid = pid;
+	}
 }

ServerType.java

@@ -1,3 +1,7 @@
+import java.util.ArrayList;
+/**
+ * Has a name and contains a list of valid server versions.
+ */
 public class ServerType {
 	private String name;
 	private String[] versions;
@@ -11,7 +15,7 @@ public class ServerType {
 		return this.name;
 	}
 	
-	public ArrayList<String> getVersions() {
+	public String[] getVersions() {
 		return this.versions;
 	}
 }