fix package name, add basic JPanel

pom.xml

@@ -10,6 +10,6 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>22</maven.compiler.source>
         <maven.compiler.target>22</maven.compiler.target>
-        <exec.mainClass>com.mykola2312.Main</exec.mainClass>
+        <exec.mainClass>com.mykola2312.mptv.Main</exec.mainClass>
     </properties>
 </project>

src/main/java/com/mykola2312/Main.java

@@ -1,7 +0,0 @@
-package com.mykola2312;
-
-public class Main {
-    public static void main(String[] args) {
-        System.out.println("Hello World!");
-    }
-}

src/main/java/com/mykola2312/mptv/Main.java

@@ -0,0 +1,10 @@
+package com.mykola2312.mptv;
+
+import com.mykola2312.mptv.ui.MainFrame;
+
+public class Main {
+    public static void main(String[] args) {
+        MainFrame frame = new MainFrame();
+        frame.create();
+    }
+}

src/main/java/com/mykola2312/mptv/ui/MainFrame.java

@@ -0,0 +1,14 @@
+package com.mykola2312.mptv.ui;
+
+import javax.swing.*;
+
+public class MainFrame {
+    private JFrame frame;
+
+    public void create() {
+        this.frame = new JFrame("MPTV");
+
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setVisible(true);
+    }
+}