package test923;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class SimpleAnimation {
int x = 70;
int y = 70;
public static void main(String[] args) {
SimpleAnimation gui = new SimpleAnimation();
gui.go();
}
private void go() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
MyDrawPanel drawPanel = new MyDrawPanel();
frame.getContentPane().add(drawPanel);
frame.setSize(300, 300);
frame.setVisible(true);
for (int i = 0; i < 130; i++) {
x++;
y++;
drawPanel.repaint();
try {
Thread.sleep(50);
} catch (Exception e) {
e.printStackTrace();
}
}
}
class MyDrawPanel extends JPanel {
public void paintComponent(Graphics g) {
g.setColor(Color.green);
g.fillOval(x, y, 40, 40);
}
}
}
运行结果:
package test923;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class SimpleAnimation1 {
int x = 70;
int y = 70;
public static void main(String[] args) {
SimpleAnimation1 gui = new SimpleAnimation1();
gui.go();
}
private void go() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
MyDrawPanel drawPanel = new MyDrawPanel();
frame.getContentPane().add(drawPanel);
frame.setSize(300, 300);
frame.setVisible(true);
for (int i = 0; i < 130; i++) {
x++;
y++;
drawPanel.repaint();
try {
Thread.sleep(50);
} catch (Exception e) {
// TODO: handle exception
}
}
}
class MyDrawPanel extends JPanel {
public void paintComponent(Graphics g) {
g.setColor(Color.white);
g.fillOval(x, y, this.getWidth(), this.getHeight());
g.setColor(Color.green);
g.fillOval(x, y, 40, 40);
}
}
}
运行结果: