Modify the classes, add a main function to each of it

src/Client.java

-public class Client {
-
-    // controller port to communicate with
-    int cport;
-    // timeout in milliseconds
-    long timeout;
-
-    public Client(int cport, long timeout) {
-        this.cport = cport;
-        this.timeout = timeout;
-    }
-}
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src/Controller.java

@@ -3,22 +3,6 @@ import java.net.*;
 
 public class Controller {
 
-    // port to listen on
-    private int cport;
-    // replication factor => number of Dstores to join
-    private int R;
-    // timeout in milliseconds
-    private long timeout;
-    // how long to wait to start the next rebalance operation
-    private long rebalance_period;
-
-    public Controller (int cport, int R, long timeout, long rebalance_period) {
-        this.cport = cport;
-        this.R = R;
-        this.timeout = timeout;
-        this.rebalance_period = rebalance_period;
-    }
-
     // orchestrates client requests
     // maintains an index with the allocation of files to Dstores
     // waits for Dstores to join the datastore (rebalance operation)
@@ -26,5 +10,15 @@ public class Controller {
 
     public static void main (String[] args) {
 
+        // port to listen on
+        final int cport = Integer.parseInt(args[0]);
+        // replication factor => number of Dstores to join
+        int R = Integer.parseInt(args[1]);
+        // timeout in milliseconds
+        int timeout = Integer.parseInt(args[2]);
+        // how long to wait to start the next rebalance operation
+        int rebalance_period = Integer.parseInt(args[3]);
+
+
     }
 }
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src/Dstore.java

 public class Dstore {
 
-    // port to listen on
-    int port;
-    // controller's port to talk to
-    int cport;
-    // timeout in milliseconds
-    long timeout;
-    // where to store the data locally
-    String file_folder;
+    public static void main (String[] args) {
 
-    public Dstore (int port, int cport, long timeout, String file_folder) {
-        this.port = port;
-        this.cport = cport;
-        this.timeout = timeout;
-        this. file_folder = file_folder;
-    }
+        // port to listen on
+        final int port = Integer.parseInt(args[0]);
+        // controller's port to talk to
+        final int cport = Integer.parseInt(args[1]);
+        // timeout in milliseconds
+        int timeout = Integer.parseInt(args[2]);
+        // where to store the data locally
+        String file_folder = args[3];
 
-    public static void main (String[] args) {
 
     }
 }
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