设置swing观感

下面我定义了4种观感，是我自己机子存在的

  final String METAL = "javax.swing.plaf.metal.MetalLookAndFeel";
  final String CDE = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
  final String WINDOWS = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
  final String WINDOWS_CLASSIC = "com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel";

  1、在JFrame的构造函数中设置观感

  try
  {
   UIManager.setLookAndFeel(WINDOWS);//在此设置要显示的观感
  } catch (ClassNotFoundException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (InstantiationException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IllegalAccessException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (UnsupportedLookAndFeelException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  SwingUtilities.updateComponentTreeUI(this);//必须的，改变观感。Dialog是我自己定义的要感变观感的类

  2、在main方法中设置

  不需要SwingUtilities.updateComponentTreeUI(this)了，因为在初始化swing组件之前设定了观感。

  try
  {
   //UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());//设置为本机系统默认观感
   UIManager.setLookAndFeel(WINDOWS_CLASSIC);
  } catch (Exception e)
  {
   e.printStackTrace();
  }