java.lang.StringIndexOutOfBoundsException尝试使用jTextField进行筛选

我提出了一种方法，帮助我用我在

jTextField

中写入的内容过滤

jTable

中的行。问题是，当我尝试在

jTextField

中写入超过8个字母时，它会抛出一个名为

Exception in thread "AWT-EventQueue-0" java.lang.StringIndexOutOfBoundsException: String index out of range: 9
at java.lang.String.substring(String.java:1907) at java.lang.String.substring(String.java:1907)
at vocaciones.test_consulta.filtrar(test_consulta.java:338)
at vocaciones.test_consulta.jTextField1KeyTyped(test_consulta.java:350)
at vocaciones.test_consulta.access$000(test_consulta.java:21)
at vocaciones.test_consulta$1.keyTyped(test_consulta.java:79)
at java.awt.Component.processKeyEvent(Component.java:6460)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2828)
at java.awt.Component.processEvent(Component.java:6282)
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.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727)
at java.awt.Component.dispatchEventImpl(Component.java:4731)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
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)

这就是方法

private void jTextField1KeyTyped(java.awt.event.KeyEvent evt) {                                     
    String text = jTextField1.getText().toUpperCase();
    jTextField1.setText(text);

    String selArt, desBd;
    String desBD = jTextField1.getText();

    int cdes = desBD.length();
    int row = 0;

    for (int i = 0; i < jTable1.getRowCount(); i++) {
        selArt = (String) jTable1.getValueAt(i, 1);
        desBd = selArt.substring(0, cdes);

        if(desBd.equalsIgnoreCase(desBD.toUpperCase())){
            row = i;
            i = jTable1.getRowCount()+1;
        }
    } 

    jTable1.changeSelection(row, 2, false, false );
    jTable1.setSelectionBackground(Color.DARK_GRAY);
}

private void jTextField1KeyTyped（java.awt.event.KeyEvent evt）{
String text=jTextField1.getText（）.toUpperCase（）；
jTextField1.setText（文本）；
弦塞拉特；
字符串desBD=jTextField1.getText（）；
int cdes=desBD.length（）；
int行=0；
对于（int i=0；i

---

我希望你能帮我解决这个问题，提前谢谢你

您得到了这个异常，因为

cdes>selArt.length（）

。检查

cdes

值，然后将其用于

substring

方法

if(cdes <= selArt.length()){
  desBd = selArt.substring(0, cdes);
}

---

if（cdes这是一个简单的问题，只需通过打印
jTable1.getRowCount（）

for（inti=0；i让我们检查您的
异常

Exception in thread "AWT-EventQueue-0" 
java.lang.StringIndexOutOfBoundsException: String index out of range: 9<-----(1)
at java.lang.String.substring(String.java:1907) at  <------(2)

线程“AWT-EventQueue-0”中出现异常
java.lang.StringIndexOutOfBoundsException:字符串索引超出范围：9lengthOfString'selArt'
检查selArt的长度，看看它是否在CDEssems的范围内，如
selArt
的长度取决于我写的第一个字母，因为它会过滤jTable行，并只显示以该字母开头的行和长度是由第一行上的信息定义的……事实上，
stArt
的长度定义了它的最大长度，这似乎是它得到的第一件事。我尝试在
jTable
上使用不同的数据，长度改变了。
Exception in thread "AWT-EventQueue-0" 
java.lang.StringIndexOutOfBoundsException: String index out of range: 9<-----(1)
at java.lang.String.substring(String.java:1907) at  <------(2)