Английский
УкраинскийЯ новичок, пытаюсь написать программу, которая строит треугольник Серпинского методом хаоса. Все работает примерно до ~700 итерации, затем вываливаются ошибки.
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import javax.swing.*;
import javax.swing.border.LineBorder;
class PointDraw extends JFrame {
int counter;
static List<ColorPoint> points;
static Color pointColor;
static JSlider pointSize;
static JSlider speedThread;
static DrawingPane pane;
List<Integer> massiveX = new CopyOnWriteArrayList<>();
List<Integer> massiveY = new CopyOnWriteArrayList<>();
JLabel jcounter = new JLabel();
void count() {
String str;
counter += 1;
str = Integer.toString(counter);
jcounter.setText(str);
}
StartGame startGame = new StartGame();
Thread thr = new Thread(startGame);
PointDraw() {
setTitle("Треугольник Серпинского");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
points = new ArrayList<>();
pointColor = Color.BLACK;
pane = new DrawingPane();
JPanel topPanel = new JPanel();
JButton colorButton = new JButton();
colorButton.setBackground(pointColor);
colorButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
pointColor = JColorChooser.showDialog(PointDraw.this,
"Выберите цвет:", pointColor);
colorButton.setBackground(pointColor);
}
});
colorButton.setPreferredSize(new Dimension(40, 40));
pointSize = new JSlider(5, 20, 5);
speedThread = new JSlider(1, 20, 1);
JButton startButton = new JButton("Старт");
startButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (massiveX.size() < 4) {
JOptionPane.showMessageDialog(null,
"Задайте необходимое количество точек!",
"Ахтунг!",
JOptionPane.WARNING_MESSAGE);
} else {
thr.start();
}
}
});
JButton stopButton = new JButton("Стоп");
stopButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
startGame.mystop();
points.clear();
pane.repaint();
massiveX.clear();
massiveY.clear();
}
});
JButton pauseButton = new JButton("Пауза");
pauseButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
startGame.mysuspended();
}
});
JButton continueButton = new JButton("Продолжить");
continueButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
startGame.myresume();
}
});
topPanel.add(new JLabel("Цвет:"));
topPanel.add(colorButton);
topPanel.add(new JLabel("Размер точки:"));
topPanel.add(pointSize);
topPanel.add(new JLabel("Скорость:"));
topPanel.add(speedThread);
topPanel.add(startButton);
topPanel.add(stopButton);
topPanel.add(pauseButton);
topPanel.add(continueButton);
topPanel.add(new JLabel("Кол-во точек:"));
topPanel.add(jcounter);
add(pane);
add(topPanel, BorderLayout.NORTH);
pack();
}
public static void main(String[] args) {
new PointDraw().setVisible(true);
}
class DrawingPane extends JComponent {
public DrawingPane() {
setPreferredSize(new Dimension(1200, 400));
setBorder(new LineBorder(Color.GRAY));
addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (points.size() < 4) {
ColorPoint point = new ColorPoint(e.getX(), e.getY(), pointSize.getValue(), pointColor);
points.add(point);
massiveX.add(e.getX());
massiveY.add(e.getY());
} else {
JOptionPane.showMessageDialog(null,
"Нельзя создавать больше 4-х точек!",
"Ахтунг!",
JOptionPane.WARNING_MESSAGE);
}
repaint();
}
});
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
for (ColorPoint p : points) {
g2.setColor(p.getColor());
int x = p.getX();
int y = p.getY();
int size = p.getSize();
g2.fillOval(x - size / 2, y - size / 2, size, size);
}
}
}
static class ColorPoint {
private int x;
private int y;
private int size;
private Color color;
public ColorPoint(int x, int y, int size, Color color) {
this.x = x;
this.y = y;
this.size = size;
this.color = color;
}
public int getX() {
return x;
}
public int getY() {
return y;
}
public Color getColor() {
return color;
}
public int getSize() {
return size;
}
}
static class RandomPoint {
int min;
int max;
static int rnd(int min, int max) {
max -= min;
return (int) (Math.random() * ++max) + min;
}
}
class StartGame extends JComponent implements Runnable {
volatile boolean suspended;
volatile boolean stopped;
synchronized void mysuspended() {
suspended = true;
}
synchronized void myresume() {
suspended = false;
notify();
}
synchronized void mystop() {
stopped = true;
}
StartGame() {
suspended = false;
stopped = false;
}
@Override
public void run() {
int n_point_x;
int n_point_y;
try {
for (int i = 0; i < 50000; i++) {
count();
synchronized (this) {
while (suspended) {
JOptionPane.showMessageDialog(null,
"Поток поставлен на паузу!",
"Ахтунг!",
JOptionPane.WARNING_MESSAGE);
wait();
}
if (stopped) break;
}
int next_point = RandomPoint.rnd(0, 2);
n_point_x = (massiveX.get(3) + massiveX.get(next_point)) / 2;
n_point_y = (massiveY.get(3) + massiveY.get(next_point)) / 2;
massiveX.remove(3);
massiveY.remove(3);
massiveX.add(n_point_x);
massiveY.add(n_point_y);
PointDraw.ColorPoint point = new PointDraw.ColorPoint(n_point_x, n_point_y, PointDraw.pointSize.getValue(), PointDraw.pointColor);
PointDraw.points.add(point);
PointDraw.pane.repaint();
Thread.sleep(PointDraw.speedThread.getValue() * 50);
}
} catch (InterruptedException ex) {
ex.printStackTrace();
}
JOptionPane.showMessageDialog(null,
"Программа закончила свою работу!",
"Ахтунг!",
JOptionPane.WARNING_MESSAGE);
}
}
}
Лог:
Exception in thread "AWT-EventQueue-0" java.util.ConcurrentModificationException at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1042) at java.base/java.util.ArrayList$Itr.next(ArrayList.java:996) at Homework.PointDraw$DrawingPane.paintComponent(PointDraw.java:149) at java.desktop/javax.swing.JComponent.paint(JComponent.java:1074) at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:907) at java.desktop/javax.swing.JComponent.paint(JComponent.java:1083) at java.desktop/javax.swing.JComponent.paintToOffscreen(JComponent.java:5255) at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBufferedImpl(RepaintManager.java:1643) at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1618) at java.desktop/javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1556) at java.desktop/javax.swing.RepaintManager.paint(RepaintManager.java:1323) at java.desktop/javax.swing.JComponent._paintImmediately(JComponent.java:5203) at java.desktop/javax.swing.JComponent.paintImmediately(JComponent.java:5013) at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:865) at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:848) at java.base/java.security.AccessController.doPrivileged(AccessController.java:389) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:848) at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:823) at java.desktop/javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:772) at java.desktop/javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1884) at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313) at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715) at java.base/java.security.AccessController.doPrivileged(AccessController.java:389) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Предполагаю, что проблема в методе repaint(), который находится в цикле...
ЧТО Я ДЕЛАЮ НЕ ТАК? :)