如何用 super() 为 Frame() 做内部构造？

Question

当 Frame() 在 super() 中使用时，如何对其进行初始化？就像以有效的方式跟随，让 Frame 和所有超级相关的颜色都变成红色？

注意：基本上右边的红色框不应该显示，因为 Color(r,g,b,ALPHA);

public class 999 extends Window 
{
  private JLabel label;
  private JButton button;
  private static final Canvas canvas = new Canvas();
  private static final Canvas canvas0 = new Canvas();
  private JLayeredPane layers;

  public 999() 
  {
        super(new Frame());
        // Please make this **TRANSPARENT**
        getOwner().setBackground( new Color(255, 0, 0, 0) ); 

        layers = new JLayeredPane();
        button = new JButton("close");

        this.setLayout (new BorderLayout ());     

        button.setBackground(Color.RED);
        button.setSize(200,200);
        button.setLocation(0,20);
        this.add("North", button);

        JPanel p = new JPanel();
        p.setOpaque(false); // transparent
        p.setBackground( new Color(255, 0, 0, 0) ); // transparent

        p.setSize(300, 200);
        p.setLocation(0, 0);
        p.add(new JButton("Test"));
        layers.add(p, new Integer(1));
        layers.setSize(400,300);
        layers.setLocation(400,50);

        layers.setOpaque(false); // transparent
        layers.setBackground( new Color(255, 0, 0, 0) ); // transparent
        this.add("North", layers);

        canvas.setSize(800,800);
        this.add("North",canvas);
        //AWTUtilities.setWindowOpacity(this, 0.2f); // Error in Linux

    }

    public static void main(String[] args) 
    {
      Window j = new 999();
      j.setVisible(true);
        ...
    }

}

Answer 1

这段代码真的很奇怪。在其他地方创建框架并设置所需的值，然后再将其提供给该对象。或者只是在您的构造函数中进行此调用：

 getOwner().setBackground( new Color(255, 0, 0, 255) );