Java：无法加载字体（从外部文件加载）

Question

In a folder called data , I have a font file called font.ttf .

I want to read it in, like this:

try {
   Font f = Font.createFont(Font.TRUETYPE_FONT, 
      new File("data/font.ttf")).deriveFont(12.0);
} catch (IOException | FontFormatException e) {}

That worked fine up until I removed the same font from the system (it's still in the data folder!). Now, it's just showing Java's generic font.

Is it even possible to read in a font from a file which is not in the System Fonts folder?

Answer 1

You don't seem to be doing anything with that Font f once you've loaded it in, so you might simply be losing it due to block scoping.

Font fallback = load some system default;
Font myfont = null;

...

try {
  File ffile = new File("data/font.ttf");
  myfont = Font.createFont(Font.TRUETYPE_FONT, ffile).deriveFont(12);
} catch (FontFormatException ffe) {
  System.out.println("Tried to load a bad font...");
  ffe.printStackTrace();
} catch (IOException ioe) {
  System.out.println("I have no idea what went wrong");
  ioe.printStackTrace();
} finally {
  loadMyApplication(myfont == null ? fallback : myfont);
}

Or if you absolutely need that font for correct UI building or content rendering, call loadMyApplication in the try block, so that any catches prevent your application from loading.