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我有一个 Jpanel,例如宽度为 500,高度为 100。我有计算屏幕中心垂直(y)和水平(x)的公式。我用它来绘制字符串(myText,x,y),但它将文本写入 jpanel 的边界之上。这是我正在使用的paintComponent 代码。

  protected void paintComponent(Graphics g) {
        Graphics2D g2d = (Graphics2D)g;
        String MenuString = Menu.get(MenuChannel);
        fontMetrics = g2d.getFontMetrics(realFont);
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setBackground(Color.PINK);
        g2d.fillRect(0,0,getWidth(),getHeight());
        g2d.setColor(Color.WHITE);
        g2d.setFont(realFont);

        java.awt.geom.Rectangle2D rect = fontMetrics.getStringBounds(MenuString, g2d);
        int textHeight = (int)rect.getHeight();
        int textWidth = (int)rect.getWidth();
        int panelHeight = getHeight();
        int panelWidth = getWidth();
        int x = (panelWidth - textWidth) / 2;
        int y = (panelHeight - textHeight) / 2;
        System.out.println("tH:" + textHeight + "\ntW:" + textWidth + "\npH:" + panelHeight + "\npW:" + panelWidth);
        g2d.drawString(MenuString,x,y);
}
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1 回答 1

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是的-这很痛苦-drawString将您的String使用y作为底线(或基本文本行)。如果你想在 Rectangle 中居中字符串,你应该使用它来实现它FontMetrics

于 2012-05-31T19:23:59.463 回答