Java JApplet到JFrame
我想将JApplet转换为JFrame。 我在互联网上发现这个代码是一个单词搜索游戏。 我想在一个类的演示中使用此代码。 但我不想在小程序中使用它。 我要在这里粘贴的代码是大约7,000个字符。 我尝试使用JApplet并扩展JFrame，然后将初始化的所有代码放入构造函数（Zero Argument构造函数）。 这导致大约十个错误，我无法修复。 我想创建一个单词搜索游戏，我找到了一个很好的例子，但我不能让它在Eclipse中运行。
class WordSearch extends JApplet implements Runnable, KeyListener, MouseListener, MouseMotionListener { // Copyright information. String copyName = "Word Search"; String copyVers = "Version 1.1"; String copyInfo = "Copyright 1999-2001 by Mike Hall"; String copyLink = "http://www.brainjar.com"; String copyText = copyName + '\n' + copyVers + '\n' + copyInfo + '\n' + copyLink; // Thread control variables. Thread loopThread; // Main thread. // Constants static final int DELAY = 50; // Milliseconds between screen updates. static final int INIT = 1; // Game states. static final int PLAY = 2; static final int OVER = 3; // Parameters and defaults. Color scrnFgColor = Color.black; // Background color. Color scrnBgColor = Color.white; // Foreground color. Color scrnBdColor = Color.black; // Border color. String scrnFontStr = "Helvetica,bold,12"; // Font. Color bttnFgColor = Color.black; // Button background color. Color bttnBgColor = Color.lightGray; // Button foreground color. String bttnFontStr = "Dialog,bold,10"; // Button font. Color gridFgColor = Color.black; // Grid text color. Color gridBgColor = Color.white; // Grid background color. Color gridHiColor = Color.yellow; // Grid highlight color. Color gridFdColor = Color.lightGray; // Grid found color. String gridFontStr = "Courier,plain,14"; // Grid font. Color listFgColor = Color.black; // List text color. Color listBgColor = Color.white; // List background color. Color listFdColor = Color.lightGray; // List found color. String listFontStr = "Helvetica,plain,12"; // List font. int gridRows = 15; // Grid rows. int gridCols = 15; // Grid columns. int gridSize = 20; // Grid cell size. Vector files = new Vector(); // List if text file URLs. // Global variables. static Vector words; // Word list. Font scrnFont; // Screen font. Font bttnFont; // Screen font. Font gridFont; // Grid font. Font listFont; // List font. // Display elements. WSGrid grid; WSList list; WSButton newGame; WSButton solveGame; WSButton scrollUp; WSButton scrollDn; // File data. int fileNum; // Game data. int gap = 4; // Gap between display elements. int gameState; // Game state. int scroll; // Scroll direction. int count; // Number of words found. long startTime; // Start time of current game. String timeText; // Elapsed time text. String statText; // Words found/total text. String subjText; // Word list subject, from file. // Off screen image. Dimension offDimension; Image offImage; Graphics offGraphics; // Applet information. public String getAppletInfo() { return(copyText); } public void init() { Dimension d = getSize(); Font f; FontMetrics fm; String s; StringTokenizer st; int n; Polygon p; int x, y; int w, h; // Display copyright information. System.out.println(copyText); // Set up mouse and key event handling and set focus to the applet window. addKeyListener(this); addMouseListener(this); addMouseMotionListener(this); requestFocus(); // Get colors. s = getParameter("screencolors"); if (s != null) { st = new StringTokenizer(s, ","); scrnFgColor = getColorParm(st.nextToken()); scrnBgColor = getColorParm(st.nextToken()); scrnBdColor = getColorParm(st.nextToken()); } s = getParameter("buttoncolors"); if (s != null) { st = new StringTokenizer(s, ","); bttnFgColor = getColorParm(st.nextToken()); bttnBgColor = getColorParm(st.nextToken()); } s = getParameter("gridcolors"); if (s != null) { st = new StringTokenizer(s, ","); gridFgColor = getColorParm(st.nextToken()); gridBgColor = getColorParm(st.nextToken()); gridFdColor = getColorParm(st.nextToken()); gridHiColor = getColorParm(st.nextToken()); } s = getParameter("listcolors"); if (s != null) { st = new StringTokenizer(s, ","); listFgColor = getColorParm(st.nextToken()); listBgColor = getColorParm(st.nextToken()); listFdColor = getColorParm(st.nextToken()); } // Get fonts. scrnFont = getFontParm(scrnFontStr); s = getParameter("screenfont"); if (s != null) if ((f = getFontParm(s)) != null) scrnFont = f; bttnFont = getFontParm(bttnFontStr); s = getParameter("buttonfont"); if (s != null) if ((f = getFontParm(s)) != null) bttnFont = f; gridFont = getFontParm(gridFontStr); s = getParameter("gridfont"); if (s != null) if ((f = getFontParm(s)) != null) gridFont = f; listFont = getFontParm(listFontStr); s = getParameter("listfont"); if (s != null) if ((f = getFontParm(s)) != null) listFont = f; // Get grid size. s = getParameter("gridsize"); if (s != null) { st = new StringTokenizer(s, ","); if ((n = Integer.parseInt(st.nextToken())) > 0) gridRows = n; if ((n = Integer.parseInt(st.nextToken())) > 0) gridCols = n; if ((n = Integer.parseInt(st.nextToken())) > 0) gridSize = n; } // Get list of word file URLs. s = getParameter("files"); if (s != null) { st = new StringTokenizer(s, ","); while (st.hasMoreTokens()) files.addElement(st.nextToken()); } // Create and position letter grid. grid = new WSGrid(gridRows, gridCols, gridSize, gridFont); grid.setColors(gridFgColor, gridBgColor, scrnBdColor, gridFdColor, gridHiColor); grid.clear(); // Create and position word list. fm = getFontMetrics(listFont); x = grid.x + grid.width + gap; w = d.width - x; h = grid.height - 2 * (fm.getHeight() + gap); list = new WSList(w, h, listFont); list.x = x; list.y = grid.y + fm.getHeight() + gap; list.setColors(listFgColor, listBgColor, scrnBdColor, listFdColor); // Create and position scroll buttons above and below work list. fm = getFontMetrics(bttnFont); w = list.width; h = fm.getHeight(); p = new Polygon(); p.addPoint(0, -h / 2 + 2); p.addPoint(-fm.getMaxAdvance() / 2, h / 2 - 2); p.addPoint(fm.getMaxAdvance() / 2, h / 2 - 2); scrollUp = new WSButton(p, w, h); scrollUp.x = list.x; scrollUp.y = grid.y; scrollUp.setColors(bttnFgColor, bttnBgColor, scrnBdColor); p = new Polygon(); p.addPoint(0, h / 2 - 2); p.addPoint(-fm.getMaxAdvance() / 2, -h / 2 + 2); p.addPoint(fm.getMaxAdvance() / 2, -h / 2 + 2); scrollDn = new WSButton(p, w, h); scrollDn.x = list.x; scrollDn.y = list.y + list.height + gap; scrollDn.setColors(bttnFgColor, bttnBgColor, scrnBdColor); // Create and position text buttons under letter grid. fm = getFontMetrics(bttnFont); s = "New Game"; w = fm.stringWidth(s) + fm.getMaxAdvance(); h = 3 * fm.getHeight() / 2; newGame = new WSButton(s, bttnFont, w, h); newGame.setColors(bttnFgColor, bttnBgColor, scrnBdColor); s = "Solve Game"; w = fm.stringWidth(s) + fm.getMaxAdvance(); solveGame = new WSButton(s, bttnFont, w, h); solveGame.setColors(bttnFgColor, bttnBgColor, scrnBdColor); fm = getFontMetrics(scrnFont); x = (grid.width - (newGame.width + solveGame.width + gap)) / 2; y = grid.x + grid.height + fm.getHeight() + fm.getMaxDescent() + 2 * gap; newGame.x = x; newGame.y = y; solveGame.x = x + newGame.width + gap; solveGame.y = y; // Initialize game data. fileNum = 0; scroll = 0; timeText = ""; statText = ""; subjText = ""; words = new Vector(); grid.fill(); endGame(); gameState = INIT; } public Color getColorParm(String s) { int r, g, b; // Check if a pre-defined color is specified. if (s.equalsIgnoreCase("black")) return(Color.black); if (s.equalsIgnoreCase("blue")) return(Color.blue); if (s.equalsIgnoreCase("cyan")) return(Color.cyan); if (s.equalsIgnoreCase("darkGray")) return(Color.darkGray); if (s.equalsIgnoreCase("gray")) return(Color.gray); if (s.equalsIgnoreCase("green")) return(Color.green); if (s.equalsIgnoreCase("lightGray")) return(Color.lightGray); if (s.equalsIgnoreCase("magenta")) return(Color.magenta); if (s.equalsIgnoreCase("orange")) return(Color.orange); if (s.equalsIgnoreCase("pink")) return(Color.pink); if (s.equalsIgnoreCase("red")) return(Color.red); if (s.equalsIgnoreCase("white")) return(Color.white); if (s.equalsIgnoreCase("yellow")) return(Color.yellow); // If the color is specified in HTML format, build it from the red, green // and blue values. if (s.length() == 7 && s.charAt(0) == '#') { r = Integer.parseInt(s.substring(1,3),16); g = Integer.parseInt(s.substring(3,5),16); b = Integer.parseInt(s.substring(5,7),16); return(new Color(r, g, b)); } // If we can't figure it out, default to black. return(Color.black); } public Font getFontParm(String s) { String t, fontName; StringTokenizer st; int n, fontStyle, fontSize; fontName = ""; fontStyle = -1; fontSize = -1; // Parse font name. st = new StringTokenizer(s, ","); t = st.nextToken(); if (t.equalsIgnoreCase("Courier")) fontName = "Courier"; else if (t.equalsIgnoreCase("Dialog")) fontName = "Dialog"; else if (t.equalsIgnoreCase("Helvetica")) fontName = "Helvetica"; else if (t.equalsIgnoreCase("Symbol")) fontName = "Symbol"; else if (t.equalsIgnoreCase("TimesRoman")) fontName = "TimesRoman"; // Parse font style. t = st.nextToken(); if (t.equalsIgnoreCase("plain")) fontStyle = Font.PLAIN; else if (t.equalsIgnoreCase("bold")) fontStyle = Font.BOLD; else if (t.equalsIgnoreCase("italic")) fontStyle = Font.ITALIC; else if (t.equalsIgnoreCase("boldItalic")) fontStyle = Font.BOLD + Font.ITALIC; // Parse font size. t = st.nextToken(); if ((n = Integer.parseInt(t)) > 0) fontSize = n; // Return the specified font. if (fontName != "" && fontStyle >= 0 && fontSize >= 0) return(new Font(fontName, fontStyle, fontSize)); // If we can't figure it out, return a null value. return (Font) null; } public void start() { if (loopThread == null) { loopThread = new Thread(this); loopThread.start(); } } public void stop() { if (loopThread != null) { loopThread.stop(); loopThread = null; } } public void run() { long threadTime, elapsedTime; Date date; int m, s; String mm, ss; // Lower this thread's priority and get the current time. Thread.currentThread().setPriority(Thread.MIN_PRIORITY); threadTime = System.currentTimeMillis(); // This is the main loop. while (Thread.currentThread() == loopThread) { // Scroll word list. list.scroll += scroll; // Update game time. if (gameState == PLAY) { elapsedTime = threadTime - startTime; m = (int) (elapsedTime / 60000); s = (int) ((elapsedTime - 60000 * m) / 1000); mm = Integer.toString(m); ss = Integer.toString(s); if (mm.length() < 2) mm = "0" + mm; if (ss.length() = words.size()) { timeText += " Done!"; statText = "Found: " + count + "/" + words.size(); endGame(); } } } public void mouseClicked(MouseEvent e) {} public void mouseEntered(MouseEvent e) {} public void mouseExited(MouseEvent e) {} public void mouseDragged(MouseEvent e) { if (gameState == PLAY && grid.select) { grid.endX = e.getX(); grid.endY = e.getY(); } } public void mouseMoved(MouseEvent e) {} public void initGame() { setWords(); grid.select = false; grid.fill(); list.scroll = 0; count = 0; startTime = System.currentTimeMillis(); timeText = ""; statText = ""; gameState = PLAY; } public void solveGame() { WSWord ws; int i; // Mark all words as found. for (i = 0; i = files.size()) fileNum = 0; s = (String) files.elementAt(fileNum); url = (URL) null; try { url = new URL(getDocumentBase(), s); } catch (Exception e) {} fileNum++; // Open it up and read list of words. subjText = ""; try { in = url.openStream(); buf = new BufferedReader(new InputStreamReader(in)); while((s = buf.readLine()) != null) if (s.startsWith("#")) subjText = "'" + s.substring(1) + "'"; else if (s.length() > 0) words.addElement(new WSWord(s)); } catch (IOException e) {} } public void update(Graphics g) { paint(g); } public void paint(Graphics g) { Dimension d = getSize(); FontMetrics fm; String s; int x, y; int w, h; // Create the off screen graphics context, if no good one exists. if (offGraphics == null || d.width != offDimension.width || d.height != offDimension.height) { offDimension = new Dimension(d.width, d.height); offImage = createImage(d.width, d.height); offGraphics = offImage.getGraphics(); } // Color the applet background. offGraphics.setColor(scrnBgColor); offGraphics.fillRect(0, 0, d.width, d.height); // Draw each game element. grid.draw(offGraphics); list.draw(offGraphics); scrollUp.draw(offGraphics); scrollDn.draw(offGraphics); newGame.draw(offGraphics); solveGame.draw(offGraphics); // Display title, messages, etc. as appropriate. offGraphics.setColor(scrnFgColor); offGraphics.setFont(scrnFont); fm = offGraphics.getFontMetrics(); if (gameState == INIT) { x = (grid.x + grid.width) / 2; y = (grid.y + grid.height) / 2; w = Math.max(fm.stringWidth(copyName), fm.stringWidth(copyVers)); w = Math.max(w, fm.stringWidth(copyInfo)); w = Math.max(w, fm.stringWidth(copyLink)); w += fm.getMaxAdvance(); h = 6 * fm.getHeight(); offGraphics.setColor(gridFgColor); offGraphics.fillRect(x - w / 2, y - h / 2, w, h); offGraphics.setColor(gridBgColor); offGraphics.drawRect(x - w / 2 + 1, y - h / 2 + 1, w - 3, h - 3); offGraphics.drawString(copyName, x - fm.stringWidth(copyName) / 2, y - 2 * fm.getHeight()); offGraphics.drawString(copyVers, x - fm.stringWidth(copyVers) / 2, y - fm.getHeight()); offGraphics.drawString(copyInfo, x - fm.stringWidth(copyInfo) / 2, y + fm.getHeight()); offGraphics.drawString(copyLink, x - fm.stringWidth(copyLink) / 2, y + 2 * fm.getHeight()); } x = (grid.x + grid.width - fm.stringWidth(subjText)) / 2; y = grid.y + grid.height + fm.getHeight(); offGraphics.drawString(subjText, x, y); s = timeText; x = Math.min(d.width - fm.stringWidth(s), list.x); offGraphics.drawString(s, x, y); s = statText; x = Math.min(d.width - fm.stringWidth(s), list.x); y += fm.getHeight(); offGraphics.drawString(s, x, y); // Copy the off screen buffer to the screen. g.drawImage(offImage, 0, 0, this); } } These are the parameters that have to interact with the JApplet 按照一个非常基本的例子……
import javax.swing.JApplet; import javax.swing.JButton; import javax.swing.JFrame; public class MyWordGame extends JApplet { public void init(){ add(new JButton("Test")); } /** * @param args */ public static void main(String[] args) { MyWordGame game=new MyWordGame(); JFrame myFrame=new JFrame("Test"); myFrame.add(game); myFrame.pack(); myFrame.setVisible(true); game.init(); } }
您可以将它作为applet或应用程序运行。 但请记住，如果您的applet与浏览器交互，您必须提供自定义的AppletContext，您可能还希望最终提供一种applet生命周期的管理（如适当时调用start（）/ stop（）/ destroy（））。