Fixed a few things

proto/ProtoOut.java

@@ -43,7 +43,7 @@ public class ProtoOut
         out.write(nameBytes);
     }
 
-    public void sendJoin(String username) throws IOException
+    synchronized public void sendJoin(String username) throws IOException
     {
         out.writeByte(ProtoID.JOIN.b);
         out.writeInt(0);
@@ -51,7 +51,7 @@ public class ProtoOut
         commit();
     }
 
-    public void sendPart(String username) throws IOException
+    synchronized public void sendPart(String username) throws IOException
     {
         out.writeByte(ProtoID.PART.b);
         out.writeInt(0);
@@ -59,7 +59,7 @@ public class ProtoOut
         commit();
     }
 
-    public void requestUserList(String username) throws IOException
+    synchronized public void requestUserList(String username) throws IOException
     {
         out.writeByte(ProtoID.LISTING.b);  // type: listing
         out.writeInt(0);  // length
@@ -67,7 +67,7 @@ public class ProtoOut
         commit();  // Make it so!
     }
 
-    public void giveUserListing(String username, String names[]) throws IOException
+    synchronized public void giveUserListing(String username, String names[]) throws IOException
     {
         out.writeByte(ProtoID.LISTING.b);
         // I can recognize bad code when I write it, and this is bad code.
@@ -80,7 +80,7 @@ public class ProtoOut
         commit();
     }
 
-    public void sendMessage(String username, String message) throws IOException
+    synchronized public void sendMessage(String username, String message) throws IOException
     {
         out.writeByte(ProtoID.MESSAGE.b);
         byte msgb[] = message.getBytes("UTF-8");
@@ -89,7 +89,7 @@ public class ProtoOut
         out.write(msgb);
     }
 
-    public void sendFile(String username, String filename, byte data[]) throws IOException
+    synchronized public void sendFile(String username, String filename, byte data[]) throws IOException
     {
         out.writeByte(ProtoID.FILE.b);
         byte fnb[] = filename.getBytes("UTF-8");
@@ -102,7 +102,7 @@ public class ProtoOut
         out.write(data);
     }
 
-    public void sendInfo(String username) throws IOException
+    synchronized public void sendInfo(String username) throws IOException
     {
         // TODO
         throw new IOException("not implemented");

sample/Main.java

@@ -4,7 +4,6 @@ import proto.ProtoHandler;
 import proto.ProtoIn;
 import proto.ProtoOut;
 
-import java.awt.desktop.OpenURIEvent;
 import java.io.*;
 import java.net.ServerSocket;
 import java.net.Socket;