import java.awt.Canvas;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.image.BufferStrategy;
import java.awt.event.*;
import javax.swing.*;
public class Main implements Runnable {
JFrame frame;
int myX = 400;
int myY = 400;
Canvas canvas;
BufferStrategy bufferStrategy;
boolean running = true;
public Main() {
frame = new JFrame("Basic Game");
JPanel panel = (JPanel) frame.getContentPane();
panel.setPreferredSize(new Dimension(500, 500));
panel.setLayout(null);
canvas = new Canvas();
canvas.setBounds(0, 0, 500, 500);
canvas.setIgnoreRepaint(true);
panel.add(canvas);
canvas.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent evt) {
moveIt(evt);
}
});
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setResizable(false);
frame.setVisible(true);
canvas.createBufferStrategy(2);
bufferStrategy = canvas.getBufferStrategy();
canvas.requestFocus();
}
public void run() {
while (running = true) {
Paint();
try {
Thread.sleep(25);
} catch (InterruptedException e) {
}
}
}
public static void main(String[] args) {
Main ex = new Main();
new Thread(ex).start();
}
public void Paint() {
Graphics2D g = (Graphics2D) bufferStrategy.getDrawGraphics();
g.clearRect(0, 0, 500, 500);
Paint(g);
bufferStrategy.show();
}
protected void Paint(Graphics2D g) {
g.fillOval(myX, myY, 30, 30);
}
public void moveIt(KeyEvent evt) {
switch (evt.getKeyCode()) {
case KeyEvent.VK_DOWN:
myY += 5;
break;
case KeyEvent.VK_UP:
myY -= 5;
break;
case KeyEvent.VK_LEFT:
myX -= 5;
break;
case KeyEvent.VK_RIGHT:
myX += 5;
break;
}
}
}
Ok, here's something that most definently works. To make it so you move continuously while holding the arrow keys, you can do it as long as the key is held down, or you can add on to the X/Y every time it redraws the screen.
