Java UI 管理器外观 (JTattoo) 导致 NULLpointer

Question

I have a java project that runs with maven. I added the JTattoo to the maven dependencies and set the GUI manager to the HiFi team in the main class:

try {
                UIManager.setLookAndFeel("com.jtattoo.plaf.hifi.HiFiLookAndFeel");
            } catch (InstantiationException ex) {
                Logger.getLogger(MainClass.class.getName()).log(Level.SEVERE, null, ex);
            } catch (IllegalAccessException ex) {
                Logger.getLogger(MainClass.class.getName()).log(Level.SEVERE, null, ex);
            } catch (UnsupportedLookAndFeelException ex) {
                Logger.getLogger(MainClass.class.getName()).log(Level.SEVERE, null, ex);
            }

When I run my application, Netbeans does not show any error and everything seems to work fine. But when I run my application, most of my JLabels are not displayed and I get a NullPointer exception and the following stacktrace (my programm keeps running):

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:2043)
    at java.awt.Component.getLocationOnScreen(Component.java:2028)
    at com.jtattoo.plaf.JTattooUtilities.getRelLocation(JTattooUtilities.java:192)
    at com.jtattoo.plaf.hifi.HiFiUtils.fillComponent(HiFiUtils.java:42)
    at com.jtattoo.plaf.hifi.HiFiRadioButtonUI.paintBackground(HiFiRadioButtonUI.java:84)
    at com.jtattoo.plaf.BaseRadioButtonUI.paint(BaseRadioButtonUI.java:97)
    at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161)
    at javax.swing.JComponent.paintComponent(JComponent.java:780)

Anybody has an idea, what can cause this problem? If this problem can't be fixed are there any similar free alternatives for the JTattoo HiFi/noir theme?

Answer 1

(a) Check your Java, there is known bug https://bugs.openjdk.java.net/browse/JDK-8043705

(b) Check your library: create new hello world-like application with jtattoo l'n'f - just a JFrame + JLabel

(c) Try to find the difference between hello world application and your real application.

Answer 2

1- import JTattoo 1.6.13 2- replace code in main

public static void main(String args[]) {

      com.jtattoo.plaf.acryl.AcrylLookAndFeel.setTheme("Green", "INSERT YOUR LICENSE KEY HERE", "Company");
     try { 
    UIManager.setLookAndFeel("com.jtattoo.plaf.hifi.HiFiLookAndFeel"); 
} catch(Exception ignored){
         System.out.println(ignored);}
     
     
     
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new NewjFrame().setVisible(true);
        
           
             
               
        }
    });
}