现在,我有一个包含一段代码的程序,如下所示:
while (arrayList.iterator().hasNext()) {
//value is equal to a String value
if( arrayList.iterator().next().equals(value)) {
// do something
}
}
我是否正确,只要迭代ArrayList就可以了？
我得到的错误是:
java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.ArrayList.get(Unknown Source)
at main1.endElement(main1.java:244)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at main1.traverse(main1.java:73)
at main1.traverse(main1.java:102)
at main1.traverse(main1.java:102)
at main1.main(main1.java:404)
我会显示其余的代码,但它非常广泛,如果我没有正确地进行迭代,我会假设唯一的可能性是我没有ArrayList正确初始化.
我试图将一个对象添加到ArrayList并抛出ArrayIndexOutOfBoundsException以下是代码
private void populateInboxResultHolder(List inboxErrors){
inboxList = new ArrayList();
try{
inboxHolder = new InboxResultHolder();
//Lots of Code
inboxList.add(inboxHolder);
}catch(Exception e){
e.printStackTrace();
}
}
例外是
[3/7/12 15:41:26:715 UTC] 00000045 SystemErr R java.lang.ArrayIndexOutOfBoundsException
[3/7/12 15:41:26:721 UTC] 00000045 SystemErr R at java.util.ArrayList.add(ArrayList.java:378)
[3/7/12 15:41:26:721 UTC] 00000045 SystemErr R at com.ml.fusion.ui.common.web.bean.inbox.InboxSearchBean.populateInboxResultHolder(InboxSearchBean.java:388)
[3/7/12 15:41:26:721 UTC] 00000045 SystemErr R at com.ml.fusion.ui.common.web.bean.inbox.InboxSearchBean.searchInboxErrors(InboxSearchBean.java:197)
[3/7/12 15:41:26:721 UTC] 00000045 SystemErr R at com.ml.fusion.ui.common.web.bean.inbox.InboxSearchBean.viewInbox(InboxSearchBean.java:207)
但是根据ArrayList.add的签名,它不应该抛出这个异常.请帮忙.
这是我的代码:
int myArray[]={1,2,3,4,5,6,7,8};
for(int counter=myArray.length; counter > 0;counter--){
System.out.println(myArray[counter]);
}
我想按降序打印出数组,而不是按升序排列(从数组的最后一个元素到第一个元素),但我只是抛出了这个错误:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 8
at task1.main(task1.java:14)
为什么会这样？我希望通过使用myArray.length将计数器设置为8,代码将打印出数组的第8个元素,然后在此之前继续打印.
编辑3:感谢@Leigh的帮助我将问题缩小到了查询中的日期列.使用原始代码集和POI时,当SpreadSheetAddRows()尝试添加包含类似日期的单元格的非常大的查询时,页面崩溃.我在这里做了一个错误报告:https://bugbase.adobe.com/index.cfm？event = bug &id = 3432184.
我有一个查询,我添加到一个spreadhseet对象,当查询具有非常多的行(在此示例中为18583)时似乎出错.确切的错误如下:
java.lang.ArrayIndexOutOfBoundsException: -32735
at java.util.ArrayList.get(ArrayList.java:324)
at org.apache.poi.hssf.model.WorkbookRecordList.get(WorkbookRecordList.j ava:50)
at org.apache.poi.hssf.model.Workbook.getExFormatAt(Workbook.java:787)
at org.apache.poi.hssf.usermodel.HSSFCell.getCellStyle(HSSFCell.java:901 )
at org.apache.poi.hssf.usermodel.HSSFSheet.autoSizeColumn(HSSFSheet.java :1727)
at coldfusion.excel.Excel.autoResize(Excel.java:1246)
at coldfusion.excel.Excel.autoResize(Excel.java:1240)
at coldfusion.excel.Excel.addRows(Excel.java:1214)
at coldfusion.runtime.CFPage.SpreadSheetAddRows(CFPage.java:7089) at coldfusion.runtime.CFPage.SpreadSheetAddRows(CFPage.java:7076)
这是相关的代码:
<cfset xls = spreadsheetNew()>
<cfset spreadsheetAddRow(xls, arrayToList( qryTest.getMeta().getColumnLabels() ))>
<cfset SpreadsheetFormatRow(xls, {bold=true,fgcolor="brown",color="white"}, 1)>
<cfset SpreadsheetAddRows(xls, qryTest)>
<cfheader name="Content-Disposition" value="attachment; filename=#filename#">
<cfcontent variable="#spreadsheetReadBinary(xls)#" reset="yes" type="application/vnd.ms-excel">
编辑:我之前成功使用过cfspreadsheet,但它没有生成带有标题的电子表格(并且它还有需要创建临时文件以供服务的缺点.)
EDIT2:关注@Leigh建议我更新了CF9/lib文件夹中的POI.现在错误已更改为以下内容:
<cfset SpreadsheetFormatRow(xls, {bold=true,fgcolor="brown",color="white"}, 1)> 给出以下消息:org.apache.poi.hssf.util.HSSFColor.getIndexHash()Ljava/util/Hashtable;
错误代码:
java.lang.NoSuchMethodError:
org.apache.poi.hssf.util.HSSFColor.getIndexHash()Ljava/util/Hashtable;
at coldfusion.excel.Excel.getHSSFColor(Excel.java:2094)
at coldfusion.excel.Excel.findFont(Excel.java:2237)
at coldfusion.excel.Excel.getCellStyle(Excel.java:2318)
at coldfusion.excel.Excel.formatRow(Excel.java:2948)
at …我很擅长编程和上课.现在,我不是要求任何人为我编写代码,但我遇到了运行时错误.在赋值中,我们需要读取一个文件,使用第一行"15"来初始化数组的大小,然后用每行的信息填充数组.
编辑:我不想发布所有的代码,因为我觉得它看起来太长了但是由于模糊的暗示,这就是它.
文件:
15
produce,3554,broccoli,5.99,1
produce,3554,broccoli,5.99,1
produce,3555,carrots,2.23,0.25
produce,3555,carrots,2.23,0.25
produce,3555,carrots,2.23,0.25
cleaning,2345,windex,5.99,1 unit
cleaning,2345,windex,5.99,1 unit
cleaning,2345,windex,5.99,1 unit
cleaning,2345,windex,5.99,1 unit
cleaning,2346,toilet paper,12.99,4 rolls
cleaning,2346,toilet paper,12.99,4 rolls
cleaning,2335,windex,2.25,1 mini sprayer
cleaning,1342,wipes,3.99,10 units
cleaning,1342,wipes,3.99,10 units
produce,3546,lettuce,2.99,0.5
我的错误:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 15
at Inventory.readFile(Inventory.java:45)
at Inventory.<init>(Inventory.java:12)
at Supermarket.main(Supermarket.java:3)
有问题的第45行的类(第45行被评论,向右滚动)"
import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
public class Inventory{
Product[] list;
String[] invData;
private int i = 0;
public int count;
public Inventory (String f){
readFile(f);
}
public int indexOfProduct(int code){
for(i=0; i<list.length; i++){
if …这是我的代码:
private void bringData() {
final TextView mTextView = (TextView) findViewById(R.id.textView);
// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(this);
String url ="http://192.168.4.1:8080/";
// Request a string response from the provided URL.
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
// Display the first 500 characters of the response string.
mTextView.setText("Response is: "+ response.substring(0,500));
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
mTextView.setText("That didn't work!");
}
});
// Add the request …我正在使用一本书学习java.有这个练习,我无法正常工作.它使用java类Double添加了两个双精度数.当我尝试在Eclipse中运行此代码时,它会在标题中给出错误.
public static void main(String[] args) {
Double d1 = Double.valueOf(args[0]);
Double d2 = Double.valueOf(args[1]);
double result = d1.doubleValue() + d2.doubleValue();
System.out.println(args[0] + "+" + args[1] + "=" + result);
}
我是Java新手。我正在尝试打印字符串中存在的字符及其计数。仅当旁边有相同字符时，计数才会增加。
例如：
I / O：Sssgs
O / P：S1s2g1s1
对每个字符的出现进行计数将得出全部计数的计数，而与相邻的字符不存在无关。篡改i和j循环会出现OutOfBounds错误。
//ch[] is the String converted to a character array.
//count[] is an array to store count of the characters
//Checks if present char and next char are same and increments count
for(int i=0;i<ch.length;i++)
{
count[i]=0;
for(int j=0;j<ch.length;j++)
{
if(ch[i]==ch[j])
{
count[i]++;
}
}
}
//Prints Distinct char
for(int i=0;i<ch.length;i++)
{
int j;
for(j=0;j<i;j++)
{
if(ch[i]==ch[j])
{
break;
}
}
if(i==j)
{
System.out.print(ch[i]+" "+count[i]);
}
}
输入> HelloWorld
预期输出应> H1 e1 l2 …
所以错误信息是这样的:
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at FcfsScheduler.sortArrival(FcfsScheduler.java:77)
at FcfsScheduler.computeSchedule(FcfsScheduler.java:30)
at ScheduleDisks.main(ScheduleDisks.java:33)
用我的代码作为
public void sortArrival(List<Request> r)
{
int pointer = 0;
int sProof = 0;
while(true)
{
if(r.get(pointer).getArrivalTime()<r.get(pointer+1).getArrivalTime())
{
Request r1 = r.get(pointer);
Request r2 = r.get(pointer+1);
r.set(pointer, r2);
r.set(pointer+1, r1);
}
else
{
sProof++;
}
++pointer;
if(pointer>r.size()-2)
{
pointer=0;
sProof=0;
}
if(sProof>=r.size()-2)
{
break;
}
}
}
错误发生在
ArrayIndexOutOfBoundsException
但我认为在指针增加后,使用代码检查数组索引是否正常.它是一个超出范围的数组异常还是别的什么？通常,当它是数组时,错误是ArrayIndexOutOfBoundsException.这里似乎有什么问题？
我收到错误java.lang.IndexOutOfBoundsException:Index:0,Size:0.
public Collection<AdDistribution> getAdDistribution(byte srch, byte cont) throws IndexOutOfBoundsException {
List<AdDistribution> mediums = new ArrayList<>();
List<AdDistribution> adDistribution = new ArrayList<>();
adDistribution.add(AdDistribution.SEARCH);
adDistribution.add(AdDistribution.CONTENT);
if (adDistribution.isEmpty()) {
return null;
}
if (srch == 0 && cont == 0) {
mediums = new ArrayList<>();
mediums.set(0, adDistribution.get(0));
}
if (srch == 1 || cont == 1) {
mediums = new ArrayList<>();
if (srch == 1) {
mediums.set(0, adDistribution.get(0));
} else if (cont == 1) {
mediums.set(0, adDistribution.get(1));
}
}
if (srch == 1 && …java ×10
arrays ×5
exception ×2
android ×1
apache-poi ×1
arraylist ×1
coldfusion ×1
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