Adicionando o plugin corretamente

pitiupi.testSocket/src/GUI/SocketTestMenu.java

@@ -0,0 +1,21 @@
+package GUI;
+
+import javax.swing.*;
+import java.awt.event.ActionEvent;
+
+public class SocketTestMenu extends JMenu {
+    private final SocketTestWindow socketTestWindow;
+
+    public SocketTestMenu(SocketTestWindow socketTestWindow) {
+        this.socketTestWindow = socketTestWindow;
+        this.setText("Chat");
+        JMenuItem menuItem = new JMenuItem();
+        menuItem.setText("Show Chat Window");
+        menuItem.addActionListener(this::showTestWindow);
+        this.add(menuItem);
+    }
+
+    private void showTestWindow(ActionEvent ae) {
+        this.socketTestWindow.setVisible(true);
+    }
+}