Adicionando o plugin corretamente

pitiupi.chat/build/built-jar.properties

@@ -1,4 +1,4 @@
-#Sat, 18 Jul 2026 10:32:46 -0300
+#Mon, 17 Aug 2026 14:26:26 -0300
 
 
 C\:\\Users\\extre\\OneDrive\\Documentos\\Faculdade\\2026_02\\Monitoria\\Pitiupi\\pitiupi.chat=

pitiupi.chat/pitiupi.chat.iml

@@ -7,5 +7,14 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library">
+      <library>
+        <CLASSES>
+          <root url="jar://$MODULE_DIR$/../pitiupi/dist/pitiupi.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
   </component>
 </module>

pitiupi.chat/src/pitiupi/chat/GUI/ChatWindow.java

@@ -91,7 +91,7 @@ public class ChatWindow extends javax.swing.JDialog {
     }
 
     private void sendMessage() {
-        if (jTextArea1.getText().trim().length() == 0) {
+        if (jTextArea1.getText().trim().isEmpty()) {
             return;
         }
         ChatMessage message = new ChatMessage(mainWindow.getUserName(), jTextArea1.getText());
@@ -101,7 +101,7 @@ public class ChatWindow extends javax.swing.JDialog {
 
     public void sendChatMessage(Message message) {
         try {
-            mainWindow.getSocket().send(message.toByteArray());
+            mainWindow.getSocketUDP().sendMulticast(message.toByteArray());
         } catch (IOException ex) {
             Logger.getLogger(MainWindow.class.getName()).log(Level.SEVERE, null, ex);
         }