I have the following class
public class FileCopyManager extends JFrame{
public static final Color TRANSPARENT_COLOR = new Color(0,0,0,0);
public FileCopyManager(){
this.setBackgroundColor(TRANSPARENT_COLOR);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(()->{
try {
UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
}
catch (Throwable e) {
}
finally{
new FileCopyManager();
}
});
}
}
However when I try to run this program I get the following error:
Exception in thread "AWT-EventQueue-0" java.awt.IllegalComponentStateException: The frame is decorated
at java.awt.Frame.setBackground(Unknown Source)
Any Ideas why this is happening?
好吧,只需使用this.setUndecorated(true)
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