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| package sample;
import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.geom.*;
public class Main extends JPanel implements Runnable {
Color color = Color.red;
int dia = 30;
long delay = 40;
private int x = 20;
private int y = 20;
private int dx = 5;
private int dy = 10;
private boolean isRunning;
protected void paintComponent(Graphics g){
super.paintComponent(g);
Color c = new Color(60,150,120);
Color c1 = new Color(50,170,80);
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g.setColor(color);
g.fillOval(x,y,30,30); // adds color to circle
g.setColor(Color.red);
g2.setColor(c);
g2.drawPolygon( new int[]{10,20,30}, new int[] {100,20,100},3);
g2.setColor(c1);
g2.fillPolygon(new int[]{10,20,30}, new int[] {100,20,100},3);
}
public void run() {
while(isVisible()) {
try {
Thread.sleep(delay);
} catch(InterruptedException e) {
System.out.println("interrupted");
}
move();
repaint();
}
}
public void move() {
if (isRunning) {
if(x + dx < 0 || x + dia + dx > getWidth()) {
dx *= -1;
color = getColor();
}
if(y + dy < 0 || y + dia + dy > getHeight()) {
dy *= -1;
color = getColor();
}
x += dx;
y += dy;
}
}
private Color getColor() {
int rval = (int)Math.floor(255);
int gval = (int)Math.floor(0);
int bval = (int)Math.floor(0);
return new Color(rval, gval, bval);
}
private void start() {
while(!isVisible()) {
try {
Thread.sleep(25);
} catch(InterruptedException e) {
System.exit(1);
}
}
Thread thread = new Thread(this);
thread.setPriority(Thread.NORM_PRIORITY);
thread.start();
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
final Main test = new Main();
JFrame f = new JFrame();
JButton start = new JButton("start");
start.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
test.isRunning = true;
}
});
JButton stop = new JButton("stop");
stop.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
test.isRunning = false;
}
});
JPanel panel = new JPanel();
panel.add(start);
panel.add(stop);
f.add(panel, java.awt.BorderLayout.NORTH);
f.getContentPane().add(test);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(new Dimension(600, 600));
f.setLocationRelativeTo(null);
f.setVisible(true);
test.start();
}
});
}
} |
(
