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    <p>You should keep a thread always executing <code>socket.accept()</code>. That is:</p> <ul> <li>Whenever you receive a client (via <code>socket.accept()</code>), you should <ul> <li>Start a new <code>Thread</code>, that will from now on take care of that client. (I'll call that <code>Thread</code> extending class <code>ClientNanny</code>);</li> <li>and then get back to run <code>socket.accept()</code> again.</li> </ul></li> </ul> <p>This is what your <code>waitForConnection()</code> method shoud look like:</p> <pre><code>private List&lt;ClientNanny&gt; clients = new ArrayList&lt;ClientNanny&gt;(); private void waitForConnection() throws IOException { while (true) { /* or some other condition you wish */ connection = server.accept(); /* will wait here */ /* this code is executed when a client connects... */ showMessage("\nNow connected to " + connection.getInetAddress().toString()); ClientNanny nanny = new ClientNanny(connection); /* call a nanny to take care of it */ clients.add(nanny); /* make sure you keep a ref to it, just in case */ nanny.start(); /* tell nanny to get to work as an independent thread */ clientCount += 1; /* you dont need this: use clients.size() now */ } } </code></pre> <p>In case you didn't notice, <code>ClientNanny</code> should be something like:</p> <pre><code>class ClientNanny extends Thread { ClientNanny(Socket baby) { this.myBaby = baby; } @Override public void run() { bed.put(myBaby); /* and probably other commands :) */ } } </code></pre> <p>Now, you should notice that the highlighted code below...</p> <pre><code>try { showMessage("Waiting For a Player To Connect..."); waitForConnection(); setupStreams(); /* &lt;--------- THIS LINE! HI! I'M A HIGHLIGHT! */ whileChatting(); /* &lt;--------- THIS LINE! HI! I'M A HIGHLIGHT TOO! */ } </code></pre> <p>Will not get executed when you change <code>waitForConnection()</code> as I suggested (as <code>waitForConnection()</code> will keep on rolling inside the <code>while(true)</code> loop). Maybe you could put the <code>socket.accept()</code> on a thread of its own... Anyway, I trust you can take it from now on, yeah?</p> <p><sup>PS.: As a final pointer, the solution above uses <code>new Thread()</code> (or <code>new ClientNanny()</code> for that matter) as it is easiest way to explain your problem. The very very optimal solution, though, might involve using an <code>ExecutorService</code> (roughly, a thread pool), as quickly pointed out in <a href="https://stackoverflow.com/a/12017742/1850609">this answer</a>.</sup></p>
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