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POhow to stop opening of duplicate window using Smack API in swing?
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copied!<p>I have 2 swing classes which extends <code>JFrame</code>. Both have <code>show()</code> method in there constructor. From <code>ClassOne</code> i called <code>ClassTwo</code> like <code>new ClassTwo()</code> on button click event. But if i press the button again new window for <code>ClassTwo</code> is opened. So how can i stop opening of ClassTwo window if one ClassTwo window is opened ?</p> <p><strong>Edit</strong></p> <p>now this problem is solved but now when i first open ClassTwo window it shows one window. Then after closing it when i again open ClassTwo window it opens two window and this count keep on increamenting. Why this is happening?</p> <p><strong>EDIT 2</strong></p> <p>I found that its not swing problem but its problem from MultiUsreChat class of Samck API. So anyone who have worked on it help me.</p> <p>the code in ClassOne is:</p> <pre><code>if(!winList.contains(room_jid)){ new ClassTwo(room_jid,....); winList.add(room_jid); } </code></pre> <p>and in ClassTwo is:</p> <pre><code>public ClassTwo(....){ ...... this.muc = new MultiUserChat(connection, room_jid); if(!muc.isJoined()) muc.join(this.user_id); //---- This line opens previously closed window. ..... if(!isVisible()) show(); } </code></pre> <p><strong>Edit 3</strong></p> <p>constructor of classone</p> <pre><code>public ClassOne(){ JButton btn = new JButton("Open"); btn.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ if(!winList.contains(room_jid)){ new ClassTwo(room_jid,....); winList.add(room_jid); } } }); } </code></pre>

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