如何改变默认观感？

Question

core java中说在/jdk/jre/lib目录下有文件swing.properties文件，可是找不到这个文件？……how to

Answer 1

public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
      //UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
      //UIManager.setLookAndFeel("com.sum.java.swing.plaf.motif.MotifLookAndFeel");
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    new Application1();
  }