Scala vs. Java

Window.java

import asciiPanel.AsciiPanel;
import game.screens.Screen;
import game.screens.StartScreen;
import java.awt.Color;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;

public class Window extends JFrame implements KeyListener {
    
    private AsciiPanel terminal;

    public Window() {
        super();
        terminal = new AsciiPanel();
        add(terminal);
        pack();
        addKeyListener(this);
        repaint();
    }
    
    @Override
    public void repaint() {
        terminal.clear();
        terminal.writeCenter("HELLO!!!1", 10);
        super.repaint();
    }

    @Override
    public void keyPressed(KeyEvent e) {
        screen = screen.respondToUserInput(e);
        repaint();
    }
    
    @Override
    public void keyReleased(KeyEvent e) { }
    
    @Override
    public void keyTyped(KeyEvent e) { }
    
    public static void main(String[] args) {
        Window window = new Window();
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setVisible(true);
        window.setBackground(Color.black);
        window.setTitle("Dungeon Dive");
    }
}

Window.scala

import java.awt.Color
import java.awt.event.{KeyEvent, KeyListener}
import javax.swing.JFrame

import asciiPanel.AsciiPanel

object Window extends JFrame() with KeyListener {

  def main (args: Array[String]) {
    Window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
    Window.setVisible(true)
    Window.setBackground(Color.BLACK)
    Window.setTitle("ScalaRL")
  }

  val terminal = new AsciiPanel()
  add(terminal)
  pack()
  addKeyListener(this)
  repaint()
  println("created")

  override def repaint(): Unit = {
    println("repaint")
    terminal.clear()
    terminal.writeCenter("HELLO!!!1", 10)
    super.repaint()
  }

  override def keyPressed(e: KeyEvent): Unit = {

  }

  override def keyTyped(e: KeyEvent): Unit = ???
  override def keyReleased(e: KeyEvent): Unit = ???
}