Java：如何防止MetalFileChooserUI$INDIDIcon.getIconWidth中的NPE？
在Windows系统上得到了以下NPE FileChooser。http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6342301
Exception in thread "AWT-EventQueue-2" java.lang.NullPointerException at javax.swing.plaf.metal.MetalFileChooserUI$IndentIcon.getIconWidth(Unknown Source) at javax.swing.SwingUtilities.layoutCompoundLabelImpl(Unknown Source) at javax.swing.SwingUtilities.layoutCompoundLabel(Unknown Source) at javax.swing.plaf.basic.BasicLabelUI.layoutCL(Unknown Source) at javax.swing.plaf.basic.BasicLabelUI.getPreferredSize(Unknown Source) at javax.swing.JComponent.getPreferredSize(Unknown Source) at javax.swing.plaf.basic.BasicListUI.updateLayoutState(Unknown Source) at javax.swing.plaf.basic.BasicListUI.maybeUpdateLayoutState(Unknown Source) at javax.swing.plaf.basic.BasicListUI$Handler.valueChanged(Unknown Source) at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source) at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source) at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source) at javax.swing.DefaultListSelectionModel.changeSelection(Unknown Source) at javax.swing.DefaultListSelectionModel.changeSelection(Unknown Source) at javax.swing.DefaultListSelectionModel.setSelectionInterval(Unknown Source) at javax.swing.JList.setSelectedIndex(Unknown Source) at javax.swing.plaf.basic.BasicComboPopup.setListSelection(Unknown Source) at javax.swing.plaf.basic.BasicComboPopup.access$300(Unknown Source) at javax.swing.plaf.basic.BasicComboPopup$Handler.itemStateChanged(Unknown Source) at javax.swing.JComboBox.fireItemStateChanged(Unknown Source) at javax.swing.JComboBox.selectedItemChanged(Unknown Source) at javax.swing.JComboBox.contentsChanged(Unknown Source)
Stack Overflow用户
发布于 2018-09-28 10:52:49
看起来解决方法说明您应该在操作过滤器之前尝试设置UI。这不起作用吗？
如果这不起作用，是否可以在设置UI的同一点创建操纵的FileFilters实例？
https://stackoverflow.com/questions/-100000809
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