Java Swing中背景的六边形是什么？

Question

I'm generating a maze by removing edges from a node's neighbor. By removal, I meant to draw the removing edge as the original color of the panel. I currently have to set it to Color.white but it looks odd. So does anyone know the hexa code of background color in Java Swing?

Answer 1

To avoid pointless JPanel creation (just to retrieve background color from it) use the UI constant that holds the default panel background color:

Color bg = UIManager.getColor ( "Panel.background" );

This will return different colors with different UIs set.

Using various constants you can also retrieve lots of other default values that way (not just colors).

Answer 2

The original background colour is RGB(238,238,238) or Hex EEEEEE

Edit : As @GuillaumePolet pointed out, this may not be the case for all platforms - so the safest way to get it is when you first create your JPanel using code such as the following:

    JPanel jp = new JPanel();

    Color bg = jp.getBackground();

    int r = bg.getRed();
    int g = bg.getGreen();
    int b = bg.getBlue();

    System.out.println(r);
    System.out.println(g);
    System.out.println(b);

This is how I got 238,238,238 and I'm using Windows on Java 1.7