private static boolean isWindows(LookAndFeel laf) {
if (laf.getID() == "Windows") {
return true;
}
if (!checkedForWindows) {
try {
WINDOWS_CLASS = Class.forName("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (ClassNotFoundException e) {
}
checkedForWindows = true;
}
return (WINDOWS_CLASS != null && WINDOWS_CLASS.isInstance(laf));
}
private static boolean isKnownLookAndFeel() {
LookAndFeel laf = UIManager.getLookAndFeel();
String lookAndFeelID = laf.getID();
return (lookAndFeelID == "GTK" || lookAndFeelID == "Aqua" || isMetal(laf) || isWindows(laf));
}
private static boolean isMetal(LookAndFeel laf) {
return (laf.getID() == "Metal" || laf instanceof MetalLookAndFeel);
}