Pure Java code to achieve meteor across the sky
- 2020-04-01 04:19:25
- OfStack
Without further ado, I will post the Java code directly to you.
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MeteorFly extends JFrame {
final int MAX = ; //(~) number of meteors
final int SLEEP = ; //The speed of the meteor (the higher the value, the slower the speed)
final int COLORLV = ; //(~) color level (can change the halo size)
final String COLOR = null; //("#"~"# FFFFFF ") halo color (default if not filled or null)
final int SIZE = ; //(~) meteor size
private MyPanel panel;
public MeteorFly() {
panel = new MyPanel();
this.getContentPane().add(panel);
this.setSize(, ); //Create a form
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
}
public static void main(String[] args) {
new MeteorFly();
}
class MyPanel extends JPanel implements Runnable {
Meteor p[];
int AppletWidth, AppletHeight;
BufferedImage OffScreen;
Graphics drawOffScreen;
Thread pThread;
public MyPanel() {
setBackground(Color.black); //Form initialization
AppletWidth = ;
AppletHeight = ;
p = new Meteor[MAX];
for (int i = ; i < MAX; i++)
p[i] = new Meteor();
OffScreen = new BufferedImage(AppletWidth, AppletHeight,
BufferedImage.TYPE_INT_BGR);
drawOffScreen = OffScreen.getGraphics();
pThread = new Thread(this);
pThread.start();
}
@Override
public void paintComponent(Graphics g) {
// TODO Auto-generated method stub
super.paintComponents(g);
g.drawImage(OffScreen, , , this);
}
@Override
final public void run() {
while (true) {
// drawOffScreen.clearRect(, , AppletWidth, AppletHeight); //
//Clear the screen
for (int i = ; i < MAX; i++) {
drawOffScreen.setColor(p[i].color); //RGB color
drawOffScreen.fillOval(p[i].x, p[i].y, SIZE, SIZE);
p[i].x += p[i].mx;
p[i].y += p[i].my;
// if (p[i].x > AppletWidth || p[i].y > AppletHeight) {
// p[i].reset();
// }
int x = p[i].x;
int y = p[i].y;
int R = p[i].color.getRed(); //Extraction of color
int G = p[i].color.getGreen();
int B = p[i].color.getBlue();
while (true) {
if (R == && G == && B == ) {
break;
}
R -= COLORLV; //Tail fading
if (R < ) {
R = ;
}
G -= COLORLV;
if (G < ) {
G = ;
}
B -= COLORLV;
if (B < ) {
B = ;
}
Color color = new Color(R, G, B);
x -= p[i].mx; //Cover the tail
y -= p[i].my;
drawOffScreen.setColor(color);
drawOffScreen.fillOval(x, y, SIZE, SIZE);
}
if (x > AppletWidth || y > AppletHeight) { //Meteor flies out of window, reset meteor
p[i].reset();
}
}
repaint();
try {
Thread.sleep(SLEEP);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
class Meteor { //Meteor class
int x, y; //Meteor location
int mx, my; //fall
Color color; //Meteor color
public Meteor() {
reset();
}
public void reset() {
int rand = (int) (Math.random() * ); //Randomly generate the location of the meteor
if (rand > ) {
x = (int) (Math.random() * );
y = ;
} else {
y = (int) (Math.random() * );
x = ;
}
mx = (int) (Math.random() * + ); //Random generation of falling velocity and Angle
my = (int) (Math.random() * + );
if (COLOR == null || COLOR.length() == ) {
color = new Color(
//Random color
(new Double(Math.random() * )).intValue() + ,
(new Double(Math.random() * )).intValue() + ,
(new Double(Math.random() * )).intValue() + );
} else {
color = Color.decode(COLOR);
}
}
}
}
The above code is the article to tell you about the pure Java code to achieve the meteor across the sky, I hope this article can bring you unexpected gains.