java.lang.StringIndexOutOfBoundsException: String index out of range: 0

[oceayan]

一jsp文件将查询结果分类存入一些数组然后显示，google上查了不少，但都没答案。请高手指教这类问题一般出在那里：
--- Exception Detail ----------------------
java.lang.StringIndexOutOfBoundsException: String index out of range: 0
at java.lang.String.charAt(String.java:460)
at jsp_servlet._ex._excc._exccpp._exccpp001.__exccpp001result._jspService(__exccpp001result.java:495)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1053)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:387)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:305)
at weblogic.servlet.internal.RequestDispatcherImpl$ForwardAction.run(RequestDispatcherImpl.java:382)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:286)
at jp.co.nec.ome.servlet.OmAbstractRequestPattern.displayRedirectPage(OmAbstractRequestPattern.java:513)
at jp.co.pc_daiwabo.c1.c1cc.servlet.C1CCEJBDefaultRequest.processRequest(C1CCEJBDefaultRequest.java:218)
at jp.co.pc_daiwabo.c1.c1cc.servlet.C1CCEJBControlServlet.dispatchRequestPattern(C1CCEJBControlServlet.java:616)
at jp.co.nec.ome.servlet.OmControlServlet.doPost(OmControlServlet.java:758)
at jp.co.nec.ome.servlet.OmEJBControlServlet.doPost(OmEJBControlServlet.java:328)
at jp.co.pc_daiwabo.c1.c1cc.servlet.C1CCEJBControlServlet.doPost(C1CCEJBControlServlet.java:545)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1053)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:387)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:305)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6310)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3622)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2569)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)

[Arias]

应该是说你的string的长度没有那么多，而你调用了！
就是String str = "123";
我的str只有长度为3 ，但是如果我再处理的时候出现str.substring(0,4)这样就会出现的问题

建议你处理字符窜的时候先打印一下它的长度看看，再看你的调用是否正确！

[wandou999]

字副串或数组引用超出范围!

[loverisyour]

数组越界

[galewithwing]

不错，看看你使用时，下标是否越界，
要是在c中就不会报错，只是出错拉

[wlnet]

错误信息说得很明白了，
你的字符串长度为0！charAt(0)越界！！