java - How can I make Diagonal movement?

This is a follow-up question to my last one. I am developing a game which has an Icon on a JLabelwhich the user controls with WASD keys. Right now it can go up, down, left, and right, but I want to know how I can make it move diagonally if two keys are held. I have recreated a short example and posted it below along with a gif(sorry, it's not very smooth), and I am hoping you can help me out. Thanks!

public class Experiments extends JFrame {
    javax.swing.Timer movement;

    int x = 230;
    int y = 120;
    boolean wPressed, aPressed, sPressed, dPressed;

    public Experiments() {
        layoutGame();
        setTitle("Example");
        setSize(500, 350);
        setLocationRelativeTo(null);
        setVisible(true);

    }

    private void layoutGame() {
        JLabel bg = new JLabel();
        bg.setIcon(new ImageIcon(this.getClass().getClassLoader().getResource("space.png")));
        add(bg, BorderLayout.CENTER);

        JLabel you = new JLabel();
        you.setBounds(x, y, 50, 50);
        you.setIcon(new ImageIcon(this.getClass().getClassLoader().getResource("happy.png")));

        bg.add(you, JLabel.CENTER);

        JTextPane direction = new JTextPane();
        direction.setText("Direction");
        add(direction, BorderLayout.SOUTH);
        move(you);

        direction.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {

                movement.stop();
                if(e.getKeyChar() == 'w') {
                    wPressed = true;
                    move(you);
                } else if (e.getKeyChar() == 'a') {
                    aPressed = true;
                    move(you);
                } else if (e.getKeyChar() == 's') {
                    sPressed = true;
                    move(you);

                } else if (e.getKeyChar() == 'd') {
                    dPressed = true;
                    move(you);
                }
                direction.setText(null);
            }
            public void keyReleased(KeyEvent e) {
                wPressed = false;
                aPressed = false;
                sPressed = false;

                dPressed = false;
            }
        });
    }

    private void move(JLabel icon) {
        int delay = 10; //milliseconds
        ActionListener taskPerformer = new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                if(icon.getX() >= 0 && icon.getX() <= 450 && icon.getY() >= 0 && icon.getY() <= 250) {

                    if (wPressed) {
                        y = y - 4;
                    } else if(aPressed) {
                        x = x - 4;
                    } else if(sPressed) {
                        y = y + 4;
                    } else if(dPressed) {
                        x = x + 4;
                    }
                    icon.setBounds(x, y, 50, 50);

                    icon.repaint();
                }
            }
        };
        movement = new javax.swing.Timer(delay, taskPerformer);
        movement.start();
    }

    public static void main(String[] args) {
        new Experiments();

    }
}

The output is smooth, but I had to make a gif, so it looks bumpy(sorry again):