一个奇怪的问题.解决了高分相送!!!

Question

//颜色盒的定义
class Colorbox extends JPanel{
  private Hashtable hTable;
  private Color[] colorArray;
  private  Color displayColor;
  private JPanel paneBox ;
  private Border selectedBorder;
  private Border unSelectedBorder;
  private Border activeSelectedB;
  public Colorbox ()
  {
  /**
     *@定义方格的颜色
  */
   colorArray = new Color[]{ Color.black,Color.gray,new Color(128,0,0),new Color(128,128,0),new Color(0,128,0),
                             new Color(0,128,128),new Color(0,0,128),new Color(128,0,128),new Color(128,128,64),
                             new Color(0,64,64),new Color(0,128,255),new Color(0,64,128),new Color(128,0,255), 
                             new Color(128,64,0),Color.white,Color.lightGray,Color.red,Color.yellow,Color.green,
                             Color.cyan,Color.blue,Color.magenta,new Color(255,255,128),new Color(0,255,128),
                             new Color(128,255,255),new Color(128,128,255),new Color(255,0,128),new Color(255,128,64)};
   hTable = new Hashtable();//~. creat a Hashtable;
    paneBox = new JPanel();//放置24个方格的面板
    paneBox.setLayout(new GridLayout(2,14));
    paneBox.setBorder(new EmptyBorder(4,4,4,4));//设置放置方格面板的面板的边框
    selectedBorder = new CompoundBorder( new MatteBorder(2,2,2,2,Color.red),
                                         new MatteBorder(0,0,0,0,getBackground()));
    unSelectedBorder = new CompoundBorder(new MatteBorder(0,0,0,0,getBackground()),
                                          new BevelBorder(BevelBorder.LOWERED,Color.white,Color.gray));
    activeSelectedB = new CompoundBorder(new MatteBorder(0,0,0,0,Color.blue),
                                         new MatteBorder(0,0,0,0,getBackground()));
    for (int i = 0;i<colorArray.length;i++)
    {
       colorElem colorelem = new colorElem(colorArray[i]);
       paneBox.add(colorelem);
       hTable.put(colorArray[i],colorelem);    
    }
   
    add(new colorDisplay());
    add(paneBox); 
  }

Answer 1

/**~~~~~~`
    *@定义每个方格
  */
  private class colorElem extends JPanel implements MouseListener
  {
     private Color color_value ;
     private boolean color_selected;
     public colorElem() {};
     public colorElem ( Color c )
     {
       color_value = c ;
       setBackground(c);
       String msc = "R"+c.getRed()+",G"+c.getGreen()+",B"+c.getBlue();
       setToolTipText(msc);
       addMouseListener(this);
     }
     public Dimension getPreferredSize()
     {
       return new Dimension(17,17);
     }
     public Dimension getMaximunSize()
     { return getPreferredSize();}
     public Dimension getMinimunSize()
     { return getPreferredSize();}
     public void setSelected(boolean selected)
     {
       color_selected = selected;
       if(color_selected)
       setBorder(selectedBorder);
       else
       setBorder(unSelectedBorder);
     }
     public void mouseClicked(MouseEvent e){}
     public void mousePressed(MouseEvent e){}
     public void mouseReleased(MouseEvent e)
     {
       displayColor = getBackground();
     }
     public void mouseEntered(MouseEvent e)
     {
       setBorder(activeSelectedB);
     }
     public void mouseExited(MouseEvent e)
     {
       setBorder(color_selected?selectedBorder:unSelectedBorder);
     }
  }
   private class colorDisplay extends JPanel
  {
    private JPanel display;
    public colorDisplay()
    {
       setBorder(BorderFactory.createLoweredBevelBorder());
       display = new colorElem();
       display.setBackground(displayColor);
       display.setBorder(new CompoundBorder(new MatteBorder(0,0,0,0,getBackground()),
                                          new BevelBorder(BevelBorder.LOWERED,Color.white,Color.gray)));
       add(display,BorderLayout.CENTER);
    }
    public Dimension getPreferredSize()
    { return new Dimension(34,34);}//设置大小
  }
}

Answer 2

准许用JB的XYLayout吗?
你说的左端,中间,应该是中间的左边?

Answer 3

用XYLayout布局管理器，可以让你随意摆放控件位置，并且不会随窗口的改变而改变。

Answer 4

但是用GridLayout的话
则空件会随着窗口的最大化,它的宽度而变很大;
我的意思是把控件放在一个固定的位置,而且它的大小
也不会随着窗口的改变而改变.