使用HEG批量处理时遇到此问题

Question

在使用HEG批量处理HDF文件为tif文件时，出现了以下问题，请问大家该如何修改：

```java
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: Cannot invoke "java.awt.Component.getFont()" because "c" is null
        at java.desktop/javax.swing.text.PlainView.calculateLongestLine(PlainView.java:782)
        at java.desktop/javax.swing.text.PlainView.updateMetrics(PlainView.java:332)
        at java.desktop/javax.swing.text.PlainView.setSize(PlainView.java:630)
        at java.desktop/javax.swing.plaf.basic.BasicTextUI$RootView.setSize(BasicTextUI.java:1826)
        at java.desktop/javax.swing.plaf.basic.BasicTextUI$RootView.paint(BasicTextUI.java:1537)
        at java.desktop/javax.swing.plaf.basic.BasicTextUI.paintSafely(BasicTextUI.java:757)
        at java.desktop/javax.swing.plaf.basic.BasicTextUI.paint(BasicTextUI.java:915)
        at java.desktop/javax.swing.plaf.basic.BasicTextUI.update(BasicTextUI.java:894)
        at java.desktop/javax.swing.JComponent.paintComponent(JComponent.java:842)
        at java.desktop/javax.swing.JComponent.paint(JComponent.java:1119)
        at java.desktop/javax.swing.JComponent.paintToOffscreen(JComponent.java:5311)
        at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBufferedFPScales(RepaintManager.java:1721)
        at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1630)
        at java.desktop/javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1570)
        at java.desktop/javax.swing.RepaintManager.paint(RepaintManager.java:1337)
        at java.desktop/javax.swing.JComponent._paintImmediately(JComponent.java:5259)
        at java.desktop/javax.swing.JComponent.paintImmediately(JComponent.java:5069)
        at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:879)
        at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:862)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
        at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
        at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:862)
        at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:835)
        at java.desktop/javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:784)
        at java.desktop/javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1898)
        at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
        at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:771)
        at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
        at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:716)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
        at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
        at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:741)
        at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
        at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
        at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
        at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
        at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
        at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/84722472348615.png "#left")

Answer 1

参考GPT和自己的思路：这是一个Java的运行时异常，原因是在执行PlainView的calculateLongestLine方法时，该方法中的参数c为null。具体原因是由于HEG批量处理HDF文件为tif文件时的代码中，可能出现了空指针异常导致出现了问题。需要检查代码中可能引起空指针的地方，对其进行修复，或者联系HEG官方支持寻求解决方法。