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POJava moving a circle in a gui with arrow keys
 

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    <p>I am trying to move a circle left with a keyEvent. So far, the circle is drawn on the window but it does not move left! I feel like the problem is where I add the Window() constructor to the container. The is no output on the console to tell me that it is working. So I dont think it even reaches the KeyEvent class. Here is my code:</p> <pre><code>import java.awt.*; import java.awt.event.*; import java.awt.geom.Ellipse2D; import javax.swing.*; public class Window extends JPanel { private static Ellipse2D.Double circle; public Window() { super(); int width = 400; int height = 400; circle = new Ellipse2D.Double(0.5 * width, 0.9 * height, 0.1 * width, 0.05 * height); addKeyListener(new MoveCircle()); } @Override protected void paintComponent(Graphics g) { super.paintComponents(g); Graphics2D brush = (Graphics2D) g; int width = getWidth(); int height = getHeight(); g.clearRect(0, 0, width, height); brush.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); brush.draw(circle); } public class MoveCircle implements KeyListener { @Override public void keyPressed(KeyEvent e) { System.out.println("Working on top!"); if (e.getKeyCode() == KeyEvent.VK_LEFT) { System.out.println("Working on bottom!"); circle.x++; repaint(); } } @Override public void keyReleased(KeyEvent e) { // TODO Auto-generated method stub } @Override public void keyTyped(KeyEvent e) { // TODO Auto-generated method stub } } public static void main(String[] args) { Window window = new Window(); JFrame frame = new JFrame(); Container container = frame.getContentPane(); container.add(new Window()); frame.addKeyEvent(window.new MoveCircle()); frame.setSize(800, 700); frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); frame.setVisible(true); } } </code></pre>
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