Спасибо за ваш ответ.
Используя приведенный ниже код, мы можем получить все имена классов.
UIManager.LookAndFeelInfo[] lookAndFeelInfos = UIManager.getInstalledLookAndFeels();
for (int i = 0; i < lookAndFeelInfos.length; i++) {
UIManager.LookAndFeelInfo lookAndFeelInfo = lookAndFeelInfos[i];
//
// Get the name of the look and feel
//
String name = lookAndFeelInfo.getName();
System.out.println("name = " + name);
//
// Get the implementation class for the look and feel
//
String className = lookAndFeelInfo.getClassName();
System.out.println("className = " + className);
}