Reformatted and commented code.

src/StockExchange/Order.java

@@ -3,14 +3,22 @@ package StockExchange;
 public abstract class Order implements Comparable<Order> {
 
     /**
-     * when
+     * When the order was created
      */
     public long timestamp = 0;
+
+    /**
+     * Number of shares
+     */
     public long size;
+
+    /**
+     * Limit price
+     */
     public double limit;
-//	long time;
-    double money = 0;
-//	public long shares=0;
+
+ //   double money = 0;
+
     public long id = 0;
     public Account account = null;
 

src/StockExchange/RandomTrader.java

@@ -3,127 +3,111 @@ package StockExchange;
 import java.util.Random;
 import StockExchange.Order.OrderStatus;
 
-public class RandomTrader extends ThreadedTrader{
+public class RandomTrader extends ThreadedTrader {
 
 //	public Account account=new Account();
-	Exchange ex=null;
+    Exchange ex = null;
     Random rand = new Random();
 
     public String name;
 
     // my current order
-	private Order myorder=null;
+    private Order myorder = null;
 
-
-	public RandomTrader (Exchange ex, long shares, double money){
-		account.money=money;
-		account.shares=shares;
-		this.ex=ex;
+    public RandomTrader(Exchange ex, long shares, double money) {
+        account.money = money;
+        account.shares = shares;
+        this.ex = ex;
     }
 
-	public void DoBuy()
-	{
+    public void DoBuy() {
 
-		if (myorder!=null)
+        if (myorder != null) {
             return;
+        }
 
-		if (account.money <= 0)
+        if (account.money <= 0) {
             return;
+        }
 
         double perc = rand.nextDouble() * 1.0;
         double lp = ex.lastprice;
-		double limit = lp/100 * perc + lp;
-
-
-		long size = (int)(account.money/(limit*1));
+        double limit = lp / 100 * perc + lp;
 
+        long size = (int) (account.money / (limit * 1));
 
         myorder = account.Buy(size, limit, ex);
         return;
     }
 
-	public void DoSell()
-	{
-		if (myorder!=null)
+    public void DoSell() {
+        if (myorder != null) {
             return;
+        }
 
-		if (account.shares<=0)
+        if (account.shares <= 0) {
             return;
+        }
 
         double perc = rand.nextDouble() * 1.0;
         double lp = ex.lastprice;
-		double limit = lp - lp/100 * perc;
+        double limit = lp - lp / 100 * perc;
 
-		long size = (int)(account.shares);
+        long size = (int) (account.shares);
 
-					
-		myorder=  account.Sell(size, limit, ex);
+        myorder = account.Sell(size, limit, ex);
     }
 
+    public void trade() {
 
-	
-	
-	public void trade(){
-
-		if (myorder != null)
-		{
+        if (myorder != null) {
             long age = myorder.getAge();
-			if (myorder.status == OrderStatus.executed)
-			{
-				myorder=null;
+            if (myorder.status == OrderStatus.executed) {
+                myorder = null;
                 //		System.out.println(name);
                 //		System.out.println("----------------------");
                 //		account.print_current();
                 return;
             }
 
-			
-			if (myorder.getAge()>10){
+            if (myorder.getAge() > 10) {
                 //System.out.println("Shall cancel now");
                 //System.out.println(myorder.status);
                 ex.CancelOrder(myorder);
-				myorder=null;
+                myorder = null;
                 return;
             }
 
             return;
         }
 
-		
-		
-		
-		
-			
         // What to do?
         int action = rand.nextInt(3);
-/*		System.out.print(name);
+        /*		System.out.print(name);
 		System.out.println("---------------------------");
 		System.out.print("Action:");
 		System.out.println(action);
          */
-/*		if (action==0)
+ /*		if (action==0)
 		{
 			DoSell();
 			return;
 		}
          */
 
-		if (action == 1)
-		{
+        if (action == 1) {
             DoBuy();
             return;
         }
 
-		if (action == 2)
-		{
+        if (action == 2) {
             DoSell();
             return;
         }
 
-		
     }
 
-/*	public void run(){
+    /*	public void run(){
 		while (true)
 		{
 			try{
@@ -141,6 +125,4 @@ public class RandomTrader extends ThreadedTrader{
 	}
 	
      */
-	
 }
-

src/StockExchange/ThreadedTrader.java

@@ -2,25 +2,22 @@ package StockExchange;
 
 public abstract class ThreadedTrader extends Thread implements Trader {
 
-	protected long sleeptime=100;
+    protected long sleeptime = 100;
 
-	public void RandomTrader (Exchange ex, long shares, double money){
+    public void RandomTrader(Exchange ex, long shares, double money) {
         //	this.ex=ex;
 
     }
 
-	public void run(){
-		while (true)
-		{
-			try{
+    public void run() {
+        while (true) {
+            try {
                 sleep(sleeptime);
-			}
-			catch(InterruptedException e) {
+            } catch (InterruptedException e) {
                 System.out.println("Interrupted");
             }
             trade();
         }
     }
 
-
 }

src/StockExchange/Trader.java

@@ -1,10 +1,11 @@
 package StockExchange;
 
+public interface Trader {
 
-public interface Trader{
     String name = null;
+
     public void trade();
-	public Account account=new Account();
+    public Account account = new Account();
 //	public Exchange ex=null;
 
 };

src/StockExchange/TraderRun.java

@@ -1,20 +1,20 @@
 package StockExchange;
 
-public class TraderRun extends Thread{
+public class TraderRun extends Thread {
+
     public String tname = "";
     public Exchange ex;
 
-	public void run(){
-		while (true)
-		{
-			try{
+    @Override
+    public void run() {
+        while (true) {
+            try {
                 sleep(100);
-			}
-			catch(InterruptedException e) {
+            } catch (InterruptedException e) {
                 System.out.println("Interrupted");
             }
 
-/*			
+            /*			
 			System.out.printf("%s locking\n", tname);
 			ex.Lock();
 			System.out.printf("%s locked\n", tname);
@@ -29,8 +29,7 @@ public class TraderRun extends Thread{
 			System.out.printf("%s unlocking\n", tname);
 //			ex.Free();
 			System.out.printf("%s unlocked\n", tname);
-*/
-			
+             */
         }
     }