java - 在屏幕中间绘制文本

Question

我试图在我的 JFrame 窗口中间绘制文本，但它偏离了一点点。

这是我尝试过的:

FontMetrics fontMetrics = g.getFontMetrics(font);

// draw title
g.setColor(Color.WHITE);
g.setFont(font);
int titleLen = fontMetrics.stringWidth("Level 1 Over!");
g.drawString("Level 1 Over!", (screenWidth / 2) - (titleLen / 2), 80);

Answer 1

我发现 TextLayout 类为字符串提供了比 FontMetrics 更好的维度。

@Override
public void paintComponent(Graphics g) {
    super.paintComponent(g);

    if (font == null) {
        return;
    }

    Graphics2D g2d = (Graphics2D) g;
    FontRenderContext frc = g2d.getFontRenderContext();
    TextLayout layout = new TextLayout(sampleString, font, frc);
    Rectangle2D bounds = layout.getBounds();

    int width = (int) Math.round(bounds.getWidth());
    int height = (int) Math.round(bounds.getHeight());
    int x = (getWidth() - width) / 2;
    int y = height + (getHeight() - height) / 2;

    layout.draw(g2d, (float) x, (float) y);
}