java - 渲染 TIFF 文件时的 AWT-EventQueue-0

Question

我正在尝试在 java 中开发图像查看器，我的代码几乎适用于所有格式，但目前渲染图像，我正在使用下一个代码：

private ImageIcon scaleImage(int indice, int w, int h, boolean thumbnail) {        
        ImageIcon image = null;
        ImageIO.setUseCache(false);

        if(fileRefernces.get(indice).toLowerCase().endsWith("tif") || fileRefernces.get(indice).toLowerCase().endsWith("tiff")  ) {
            File initialImage = new File(fileRefernces.get(indice));        
            try {
                BufferedImage bImage = ImageIO.read(initialImage);
                image = new ImageIcon(bImage); 
                bImage.flush();
                bImage = null;
            } catch (IOException ex) {
                //Logger.getLogger(ImageRender.class.getName()).log(Level.SEVERE, null, ex);
            } 
            initialImage = null;
        } else {
            image = new ImageIcon(fileRefernces.get(indice)); 
        }

        int nw = image.getIconWidth();
        int nh = image.getIconHeight();

        if(nw > w) {
          nw = w;
          nh = (nw * image.getIconHeight()) / image.getIconWidth();
        }

        if(nh > h) {
          nh = h;
          nw = (image.getIconWidth() * nh) / image.getIconHeight();
        }

        System.gc();

        return (thumbnail) 
                ? new ImageIcon(image.getImage().getScaledInstance(nw, nh, Image.SCALE_FAST )) 
                : new ImageIcon(image.getImage().getScaledInstance(nw, nh, Image.DEFAULT));
    }

但是，我在运行时收到下一个错误。

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at com.bog.company.render.ImageRender.scaleImage(ImageRender.java:815)
        at com.bog.company.render.ImageRender.lambda$CargarDocumento$2(ImageRender.java:700)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$500(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source) Exception in thread "Thread-6" java.lang.NullPointerException
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at com.bog.company.render.ImageRender.scaleImage(ImageRender.java:815)
        at com.bog.company.render.ImageRender.CompletarMiniaturas(ImageRender.java:752)
        at com.bog.company.render.ImageRender.lambda$CargarDocumento$3(ImageRender.java:716)
        at java.lang.Thread.run(Unknown Source) Exception in thread "AWT-EventQueue-0" Exception in thread "Thread-9" java.lang.NullPointerException
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at com.bog.company.render.ImageRender.scaleImage(ImageRender.java:815)
        at com.bog.company.render.ImageRender.lambda$CargarDocumento$2(ImageRender.java:700)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$500(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source) java.lang.NullPointerException
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at com.bog.company.render.ImageRender.scaleImage(ImageRender.java:815)
        at com.bog.company.render.ImageRender.CompletarMiniaturas(ImageRender.java:752)
        at com.bog.company.render.ImageRender.lambda$CargarDocumento$3(ImageRender.java:716)
        at java.lang.Thread.run(Unknown Source) Exception in thread "Thread-10" java.lang.NullPointerException
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at com.bog.company.render.ImageRender.scaleImage(ImageRender.java:815)
        at com.bog.company.render.ImageRender.CompletarMiniaturas(ImageRender.java:752)
        at com.bog.company.render.ImageRender.lambda$CargarDocumento$3(ImageRender.java:716)
        at java.lang.Thread.run(Unknown Source) Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at com.bog.company.render.ImageRender.scaleImage(ImageRender.java:815)
        at com.bog.company.render.ImageRender.lambda$CargarDocumento$2(ImageRender.java:700)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$500(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source) Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at com.bog.company.render.ImageRender.scaleImage(ImageRender.java:815)
        at com.bog.company.render.ImageRender.lambda$CargarDocumento$2(ImageRender.java:700)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$500(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source) Exception in thread "Thread-11" java.lang.NullPointerException
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at com.bog.company.render.ImageRender.scaleImage(ImageRender.java:815)
        at com.bog.company.render.ImageRender.CompletarMiniaturas(ImageRender.java:752)
        at com.bog.company.render.ImageRender.lambda$CargarDocumento$3(ImageRender.java:716)
        at java.lang.Thread.run(Unknown Source)

但是，tif 图像会发生这种情况。有人对如何解决它有想法吗？

标签： javaswing