initial commit

.gitignore

@@ -0,0 +1,3 @@
+.idea/
+out/
+*.iml

src/Launcher.java

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+import javax.swing.*;
+
+public class Launcher {
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                MainWindow main = new MainWindow();
+                main.show();
+            }
+        });
+    }
+}

src/MainWindow.java

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+import javax.swing.*;
+
+public class MainWindow {
+    private JFrame window;
+
+    public MainWindow() {
+        window = new JFrame();
+        window.setTitle("Tetris");
+        window.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+        window.setSize(800, 500);
+        window.setLocationRelativeTo(null);
+    }
+
+    public void show() {
+        window.setVisible(true);
+    }
+}