有沒有人遇到過這個問題?有時顯示字符串,有時候是一半,有時甚至沒有。當使用VolatileImage代替BufferedImage作爲後備緩衝器時,問題惡化。Java Graphics.drawString並不總是有效
public class Game3D {
public static void main(String[] args) {
Game3D game = new Game3D();
game.start();
}
public Game3D() {
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
canv = new GameCanvas();
canv.setPreferredSize(new Dimension(800, 600));
frame.add(canv);
frame.pack();
frame.setVisible(true);
}
private JFrame frame;
private GameCanvas canv;
public void start() {
canv.createBuffer(canv.getPreferredSize());
loadingScreen("Loading", 10);
}
public void loadingScreen(String msg, int done) {
Graphics2D g = canv.img.createGraphics();
try {
g.setColor(Color.BLACK);
g.fillRect(0, 0, canv.getWidth(), canv.getHeight());
int sizeX = 400, sizeY = 50;
int loadX = canv.getWidth()/2 - sizeX/2;
int loadY = canv.getHeight()/2 - sizeY/2;
g.setColor(Color.RED);
g.drawRect(loadX, loadY, sizeX, sizeY);
g.fillRect(loadX + 2, loadY + 2, (int) (sizeX/100F * done), sizeY - 3);
int textX = canv.getWidth()/2 - g.getFontMetrics().stringWidth(msg)/2;
int textY = canv.getHeight()/2 - g.getFontMetrics().getHeight()/2;
g.setColor(Color.WHITE);
g.setFont(canv.font);
g.drawString(msg, textX, textY);
} finally {
g.dispose();
}
}
}
類的GameCanvas擴展畫布{
GameCanvas() {
}
BufferedImage img;
Font font;
void createBuffer(Dimension dim) {
img = new BufferedImage(dim.width, dim.height, BufferedImage.TYPE_INT_ARGB);
font = new Font(Font.MONOSPACED, Font.PLAIN, 16);
}
@Override
public void paint(Graphics g) {
g.drawImage(img, 0, 0, null);
}
}
首先,您的主代碼不在擺動線程中運行。嘗試使用SwingUtilities.invokeLater()。 http://java.sun.com/products/jfc/tsc/articles/threads/threads1.html – Bill 2012-03-28 04:30:20
我在swing線程中運行了框架初始化代碼,它似乎已經解決了這個問題。謝啦。 – Colby 2012-03-28 04:40:29
不要將Swing與AWT組件混合! – 2012-03-28 05:34:15