Question

当我尝试使用JFileChooser从硬盘中选择文件后尝试读取文件时，NetBeans正在发送错误消息错误消息我收到此消息但该文件未在JTable中加载

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at AnimeAid.GuiInterface.createModel(GuiInterface.java:252)
at AnimeAid.GuiInterface.access$100(GuiInterface.java:34)
at AnimeAid.GuiInterface$2.actionPerformed(GuiInterface.java:144)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:708)
at java.awt.EventQueue$4.run(EventQueue.java:706)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

阅读方法

private DefaultTableModel createModel(String srtPath) {
    int maxLine = ReadFile.maxLine(srtPath);  // debug
    //Object[][] data = new Object[maxLine][];
    System.out.println(maxLine);  // debug
    ArrayList<String> ends = ReadFile.getFileEndingTime(srtPath);
    ArrayList<String> starts = ReadFile.getFileStartingTime(srtPath);
    ArrayList<String> subs = ReadFile.readSubtitles(srtPath);
    for (int i = 0; i < ReadFile.maxLine(srtPath) - 1; i++) {
        model.addRow(new Object[] {starts.get(i), ends.get(i), subs.get(i)});
    }


    return model;
}

第221行是

model.addRow(new Object[] {starts.get(i), ends.get(i), subs.get(i)});

当我将此应用于我的for循环内的代码并删除model.addRow（new ..）时，我将所有值打印出来，因此它不是= null所以如果我没有删除model.addRow则会出现什么问题...仅打印文件的第一个值

System.out.println(lins.get(i)+" "+starts.get(i)+" "+ ends.get(i)+" "+ subs.get(i));

打印值如下所示

    1 00:00:01,600 0:00:04,080 <b>Mr Magnussen, please state your
full name for the record.</b>
2 00:00:04,080 0:00:07,040 Charles Augustus Magnussen.
3 00:00:08,960 0:00:12,160 how would you describe your

现在我将添加与案例相关的每个声明和初始化

public class GuiInterface extends JFrame {
    String[] columnNames = {"#", "Start", "End", "Translation column"};
    DefaultTableModel model;
public GuiInterface(String title){
table = new JTable(new DefaultTableModel(columnNames, 1)); // look here


  ImageIcon openIcon = new ImageIcon(
                GuiInterface.class.getResource("/resources/image/folder-icon.png"));
        ImageIcon saveIcon = new ImageIcon(
                GuiInterface.class.getResource("/resources/image/red-disk-icon.png"));
        ImageIcon newIcon = new ImageIcon(
                GuiInterface.class.getResource("/resources/image/Actionsnew-icon.png"));




        Action openAction = new AbstractAction("Open Subtitle", openIcon) {
            @Override
            public void actionPerformed(ActionEvent e) {
                ourFileSelector.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
                ourFileSelector.showSaveDialog(null);
                ourSrtFile =  ourFileSelector.getSelectedFile();
                srtPath = ourSrtFile.getAbsolutePath();
                DefaultTableModel model = createModel(srtPath); //look here
                table.setModel(model);
            }
        };

}

 private DefaultTableModel createModel(String srtPath) {
    //int maxLine = ReadFile.maxLine(srtPath);  // debug
    //Object[][] data = new Object[maxLine][];
    //System.out.println(maxLine);  // debug
    DefaultTableModel model = new DefaultTableModel(columnNames, 0);// and here
    ArrayList<String> ends = ReadFile.getFileEndingTime(srtPath);
    ArrayList<String> starts = ReadFile.getFileStartingTime(srtPath);
    ArrayList<String> subs = ReadFile.readSubtitles(srtPath);
    ArrayList<String> lins = ReadFile.ArraylineLengths(srtPath);
    for (int i = 0; i < ReadFile.maxLine(srtPath) - 1; i++) {
        //System.out.println(lins.get(i)+" "+starts.get(i)+" "+ ends.get(i)+" "+ subs.get(i));
        model.addRow(new Object[] {lins.get(i), starts.get(i), ends.get(i), subs.get(i)});
    }
    return model;
}

尝试加载文件信息java.lang.NullPointerException时出错

0 个答案: