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Panel.java
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Panel.java
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import javax.swing.*;
import java.awt.*;
public class Panel extends JPanel implements Runnable {
private Color[][] grid;
private int x;
private int y;
private int direction;
private boolean canRun;
Panel() {
grid = new Color[37][50];
for (int i = 0; i < grid.length; i++) {
for (int j = 0; j < grid[i].length; j++) {
grid[i][j] = Color.WHITE;
}
}
x = 25;
y = 18;
direction = 90;
canRun = true;
}
private void update() {
if (grid[y][x].equals(Color.WHITE)) {
direction += 90;
grid[y][x] = Color.RED;
} else if (grid[y][x].equals(Color.RED)) {
direction -= 90;
grid[y][x] = Color.WHITE;
}
if (direction > 360) {
direction -= 360;
} else if (direction <= 0) {
direction += 360;
}
switch (direction) {
case 90:
x++;
break;
case 180:
y++;
break;
case 270:
x--;
break;
case 360:
y--;
break;
}
if (x >= 50 || y >= 37 || x < 0 || y < 0) {
canRun = false;
}
}
public void run() {
while (canRun) {
try {
Thread.sleep(500);
update();
repaint();
} catch (InterruptedException ignored) {}
}
}
public void paint(Graphics g) {
for (int i = 0; i < grid.length; i++) {
for (int j = 0; j < grid[i].length; j++) {
g.setColor(Color.BLACK);
g.fillRect(j * 16, i * 16, 16, 16);
g.setColor(grid[i][j]);
g.fillRect(j * 16 + 2, i * 16 + 2, 12, 12);
}
}
}
}