为什么我会得到这个ArrayIndexOutOfBoundsException？

Question

我有一个程序可以读取包含数据的文件。我将一些列保存在ArrayList或HashMap中。每列都有一些数据，一个带有文字的字符串或一个空的＆＃39; string，因为列由制表符分隔。有些单元格是空的，但是在ArrayList或HashMap中保存了一个空字符串，因为它仍在两个标签之间。

当我想打印例如HashMap＆＃39; PeopleHashMap＆＃39;或ArrayList＆＃39; GenderList＆＃39;，我收到此错误：

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 8
    at project.GUI.SearchButtonActionPerformed(GUI.java:310)
    at project.GUI.access$400(GUI.java:26)
    at project.GUI$10.actionPerformed(GUI.java:171)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
    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:6535)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
    at java.awt.Component.processEvent(Component.java:6300)
    at java.awt.Container.processEvent(Container.java:2236)
    at java.awt.Component.dispatchEventImpl(Component.java:4891)
    at java.awt.Container.dispatchEventImpl(Container.java:2294)
    at java.awt.Component.dispatchEvent(Component.java:4713)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
    at java.awt.Container.dispatchEventImpl(Container.java:2280)
    at java.awt.Window.dispatchEventImpl(Window.java:2750)
    at java.awt.Component.dispatchEvent(Component.java:4713)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

当我将相同的System.out.println行放在（所以IN）while循环的末尾时，将打印ArrayList / HashMap。但是，当然，很多次（每一行）。当我把它放在while循环之外时（就像现在一样），我得到上面的错误。谁能告诉我什么是错的？他们在错误中讨论的第310行是!!!左边的行。

我的代码：

private void SearchButtonActionPerformed(java.awt.event.ActionEvent evt) {                                             
    JFileChooser chooser = new JFileChooser();                          
    chooser.showOpenDialog(null);                                       
    File f  = chooser.getSelectedFile();
    String filename = f.getAbsolutePath();
    FileTextfield.setText(filename);

    try {    
        BufferedReader BR = new BufferedReader(new FileReader(f)); 
        String line;
        String name;
        String id;
        String gender;
        ArrayList<String> GenderList = new ArrayList<>();
            while ((line= BR.readLine()) != null){   
                String[] person = line.split("\\t");
!!!             name = person[8]; 
                id = person[0];
                gender = person[2];

                if (!GenderList.contains(gender)){
                    GenderList.add(gender);
                }

                if (PeopleHashMap.containsKey(name)){
                    ArrayList CurrentList = PeopleHashMap.get(name);
                    CurrentList.add(id);
                }
                if (!PeopleHashMap.containsKey(name)){
                    ArrayList<String> idList = new ArrayList<>();
                    idList.add(id);
                    PeopleHashMap.put(name, idList);
                }             
            }                  
        System.out.println(GenderList);  

数据示例：