我用这个问题的答案。
我使用的代码如下所示:
public void drawCenteredString(Graphics g, String text, Rectangle rect, Font font) { // Get the FontMetrics FontMetrics metrics = g.getFontMetrics(font); // Determine the X coordinate for the text int x = rect.x + (rect.width - metrics.stringWidth(text)) / 2; // Determine the Y coordinate for the text (note we add the ascent, as in java 2d 0 is top of the screen) int y = rect.y + ((rect.height - metrics.getHeight()) / 2) + metrics.getAscent(); // Set the font g.setFont(font); // Draw the String g.drawString(text, x, y);}


