Adicionando o plugin corretamente

pitiupi.testSocket/src/plugin/SocketTest.java

@@ -0,0 +1,56 @@
+package plugin;
+
+import GUI.SocketTestMenu;
+import GUI.SocketTestWindow;
+import net.TestMessage;
+import pitiupi.GUI.MainWindow;
+import pitiupi.net.Message;
+import pitiupi.plugin.Plugin;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+
+public class SocketTest implements Plugin{
+    SocketTestWindow socketTestWindow;
+
+    @Override
+    public String getName() {
+        return "Test Socket";
+    }
+
+    @Override
+    public String getAuthor() {
+        return "Gustavo Henrique";
+    }
+
+    @Override
+    public String getVersion() {
+        return "0";
+    }
+
+    @Override
+    public void createPlugin(MainWindow mainWindow) {
+        this.socketTestWindow = new SocketTestWindow(mainWindow);
+        mainWindow.addMenu(new SocketTestMenu(socketTestWindow));
+    }
+
+    @Override
+    public Message getMessage() {
+        return new TestMessage();
+    }
+
+    @Override
+    public void receiveMessage(byte[] bytes) {
+        ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
+        ObjectInputStream ois;
+        try {
+            ois = new ObjectInputStream(bis);
+            if (ois.readObject() instanceof TestMessage msg) {
+                this.socketTestWindow.receiveMessage(msg);
+            }
+        } catch (IOException | ClassNotFoundException ex) {
+            System.out.println(ex.toString());
+        }
+    }
+}