如何在JFrame中使用bufferedimage进行图像渲染？

Question

    public static void createWindow() {
        frame = new JFrame("PlanetSim");
        
        frame.setPreferredSize(new Dimension(WINDOW_X, WINDOW_Y));
        frame.setMaximumSize(new Dimension(WINDOW_X, WINDOW_Y));
        frame.setMinimumSize(new Dimension(WINDOW_X, WINDOW_Y));

        foregroundLabel = new JLabel(new ImageIcon(foreground));
        
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setResizable(false);
        frame.add(foregroundLabel);
        frame.pack();
        
        frame.setVisible(true);
    }

    public static void setForeground() {
        frame.getContentPane().remove(foregroundLabel);
        foregroundLabel = new JLabel(new ImageIcon(foreground));
        frame.getContentPane().add(foregroundLabel);
        frame.pack();
    }

    public void run() {
        long lastTime = System.nanoTime(), now; //keeps track of time on computer in nanoseconds
        double amountOfTicks = 60.0; //number of ticks per rendering
        double delta = 0; //time step 
        long timer = System.currentTimeMillis(); //timer to display FPS every 1000 ms
        int frames = 0;

        while (running) {
            now = System.nanoTime();
            delta += (now - lastTime) * amountOfTicks / 1000000000;
            lastTime = now;
            while(delta >= 1) {
                tick();
                delta--;
            }
            if (running)
                render();
            frames++;

            if (System.currentTimeMillis() - timer > 1000) {
                timer += 1000;
                System.out.println("FPS: " + frames);
                frames = 0;
            }
        }   
    }

    public void render() {
        populateWindow();
        Window.setForeground();
    }

Answer 1

    frame.getContentPane().remove(foregroundLabel);
    foregroundLabel = new JLabel(new ImageIcon(foreground));
    frame.getContentPane().add(foregroundLabel);
    frame.pack();

我会建议没有必要删除/添加标签或包装框架，因为我会假设图标将是相同的大小每次。

你所需要做的就是替换标签的图标。

    //frame.getContentPane().remove(foregroundLabel);
    foregroundLabel.setIcon( new ImageIcon(foreground) );
    //frame.getContentPane().add(foregroundLabel);
    //frame.pack();

我试图呈现一组复杂的对象，而不是试图单独呈现每个对象，我认为将它们呈现为BufferedImage会更快