安卓 java，libgdx无法显示自定义字体

Question

我有下面的类，假设它引用一种字体，然后在事件发生后在屏幕上绘制一个字符串。这门课的名字是这样的

if（grumpface.whiteballoon.getBoundingRectangle（）。重叠（spriterect））{

                ((Game) Gdx.app.getApplicationListener()).setScreen(new GameOverScreen());
        }
        ;

它引用的类，但我仍然不能让字体出现任何提示

class GameOverScreen implements Screen{

    private Stage stage;

    // Called automatically once for init objects
    @Override
    public void show() { 
        stage = new Stage();

       stage.setDebugAll(true); // Set outlines for Stage elements for easy debug

        BitmapFont white = new BitmapFont(Gdx.files.internal("hazey.fnt"), false);
        LabelStyle headingStyle = new LabelStyle(white, Color.BLACK);
        Label gameoverstring = new Label("game ovaaaa!", headingStyle);
        gameoverstring.setPosition(100, 100);
        stage.addActor(gameoverstring);


    }

    // Called every frame so try to put no object creation in it
    @Override
    public void render(float delta) { 
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);


       stage.act(delta);

        stage.draw();



    }