【原创】Java迷宫生成器

import javax.swing.*; import java.awt.*; import java.awt.event.*; /** * This is a stripped-down version of the Canvas class from the * BlueJ team, retaining only the most fundamental features. * * @author BlueJ team with modifications by Gordon Royle (July 2003) and Rachel Cardell-Oliver * @version Feb 2011 */ public class SimpleCanvas { private JFrame frame; private CanvasPane canvas; private Graphics2D graphic; private Image canvasImage; private boolean autoRepaint; /** * Creates and displays a SimpleCanvas of the specified size * with a white background. The client specifies whether repainting * after a drawing command should be manual or automatic. * * @param title title for the window * @param width the desired width of the SimpleCanvas * @param height the desired height of the SimpleCanvas * @param autoRepaint true for automatic repainting * */ public SimpleCanvas(String title, int width, int height, boolean autoRepaint) { frame = new JFrame(); canvas = new CanvasPane(); frame.setContentPane(canvas); frame.setTitle(title); canvas.setPreferredSize(new Dimension(width,height)); frame.pack(); Dimension size = canvas.getSize(); canvasImage = canvas.createImage(size.width,size.height); graphic = (Graphics2D) canvasImage.getGraphics(); graphic.setColor(Color.white); graphic.fillRect(0,0,size.width,size.height); graphic.setColor(Color.black); frame.setVisible(true); frame.setVisible(true); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.autoRepaint = autoRepaint; } /** * Creates and displays a SimpleCanvas with a white background and * with automatic repainting after drawing commands. * * @param title title for the window * @param width the desired width of the SimpleCanvas * @param height the desired height of the SimpleCanvas * */ public SimpleCanvas(String title, int width, int height) { this(title,width,height,true); } /** * Creates and displays a SimpleCanvas of size 400x400 with the * default title "SimpleCanvas" and with automatic repainting * enabled. */ public SimpleCanvas() { this("SimpleCanvas",400,400); } /** * Draws a line on the SimpleCanvas between two points. * * @param x1 x-coordinate of the first point * @param y1 y-coordinate of the first point * @param x2 x-coordinate of the second point * @param y2 y-coordinate of the second point * */ public void drawLine(int x1, int y1, int x2, int y2) { graphic.drawLine(x1,y1,x2,y2); if (autoRepaint) { canvas.repaint(); } } /** * Changes the colour for subsequent * drawing on this SimpleCanvas. * * @param newColour the new drawing colour */ public void setForegroundColour(Color newColour) { graphic.setColor(newColour); } /** * Gets the colour currently used for * drawing on this SimpleCanvas. * @return current foreground colour */ public Color getForegroundColour() { return graphic.getColor(); } /** * Changes the font for subsequent String * drawing on this SimpleCanvas. * * @param newFont the new Font */ public void setFont(Font newFont) { graphic.setFont(newFont); } /** * Gets the font currently used for * String drawing on this Canvas * @return current font for canvas */ public Font getFont() { return graphic.getFont(); } /** * Draws the specified String at the specified * location on this SimpleCanvas * @param text String to write on the canvas * @param x horizontal coordinate (from left) to place text * @param y vertical coordinate (from top) to place text */ public void drawString(String text, int x, int y) { graphic.drawString(text, x, y); if (autoRepaint) { canvas.repaint(); } } /** * Sets the repaint mode to either manual or automatic. * * @param autoRepaint automatic repainting if this is true */ public void setAutoRepaint(boolean autoRepaint) { this.autoRepaint = autoRepaint; } /** * If a SimpleCanvas does not automatically repaint * after each drawing command, then this method can be * used to cause a manual repaint. */ public void repaint() { canvas.repaint(); } /** * Causes execution to pause for the specified amount of time. * This is usually used to produce animations in an easy * manner, by repeatedly drawing, pausing, and then redrawing * an object. * @param millis number of milliseconds to pause for */ public void wait(int millis) { try { Thread.sleep(millis); } catch (InterruptedException ie) { System.out.println("Interrruption in SimpleCanvas: "+ie); } } /** * listener to wait for mouse clicks * @param ml the name of the mouse listener */ public void addMouseListener(MouseListener ml) { canvas.addMouseListener(ml); } /** * Inner class CanvasPane - the actual canvas component contained in the * Canvas frame. This is essentially a JPanel with added capability to * refresh the image drawn on it. */ class CanvasPane extends JPanel { /** * refresh method * @param g Graphics object */ public void paint(Graphics g) { g.drawImage(canvasImage,0,0,null); } } }