indexoutofboundsexception

问题 Whenever I try to access the number of a contact I get an index out of bounds exception, can anyone please tell me what I am doing wrong here. Members of the class private String[] names; private String[] number; In my onCreate ContentResolver cr = getContentResolver(); Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null); if (cur.getCount() > 0) { names = new String[cur.getCount()]; number = new String[cur.getCount()]; while (cur.moveToNext()) { String id =

问题 I am learning Java multithreading. I wrote a small piece of code and results in some output which i am not able to understand..please help with some explanation. Posting the code below. package com.java.learn; import java.util.ArrayList; import java.util.List; public class ListTestWithMultiThread { static final List<Integer> list = new ArrayList<Integer>(); public static void main(String[] args) { new Thread(new Runnable() { @Override public void run() { for (int i = 1; i <= 100; i++) { list

问题 I am using an Array List to store data about moving objects on screen. I suspect this is because my renderer and my logic are running on separate threads, but sometimes when data is removed from the list I get an indexOutOfBoundsException. I have taken all the steps I can think of to avoid this including try/catch but the exception still sometimes occurs. This is the part of my renderer thread that seems to cause the exception. public void drawMobs(GL10 gl) { boolean playing =

问题 I have this: public class DoubleList<Key, Elem> implements ADTDoubleList<Key, Elem> { private Vector<Node<Key, Elem>> leftRight = new Vector<Node<Key, Elem>>(2); private int[] numLeftNumRight = new int[2]; public DoubleList() { this.leftRight.set(0, null); this.leftRight.set(1, null); this.numLeftNumRight[0] = 0; this.numLeftNumRight[1] = 0; } } and it throws an ArrayIndexOutOfBoundsException. I don't know why. Could someone help me? 回答1: You can't set an element in a Vector or any other List

问题 The data access code in my Android app raises an exception. Here is the code that causes the exception: String getPost = "SELECT * FROM " + TABLE_POST + ";"; Cursor result = getReadableDatabase().rawQuery(getPost, null); List posts = new ArrayList();{ Log.d("count", result.getCount() + " post rows"); while (result != null && result.moveToNext()); Post post = new Post(); post.setPostId(result.getInt(0)); posts.add(post); .... } The exception raised is: android.database

问题 In this code below I try to access the '-1'th element of an array, I don't get any runtime error. #include <stdio.h> int A[10] = {0}; int main(){ A[-1] += 12; printf("%d",A[-1]); return 0; } When I run the code, it outputs 12 that means it is adding 12 to the non-existent A[-1]. Till today whenever I had tried to access an out-of-bounds element, I had got a runtime-error. I had never tried it on a simple code before. Can anyone explain why does my code run successfully? I ran it on my

问题 StackTrace: 08-19 08:47:02.189: E/AndroidRuntime(1857): FATAL EXCEPTION: main 08-19 08:47:02.189: E/AndroidRuntime(1857): Process: com.loco.android, PID: 1857 08-19 08:47:02.189: E/AndroidRuntime(1857): java.lang.ArrayIndexOutOfBoundsException: length=1; index=4 08-19 08:47:02.189: E/AndroidRuntime(1857): at com.sit.loco.frgment.VideoListFragment.onCreateView(VideoListFragment.java:117) 08-19 08:47:02.189: E/AndroidRuntime(1857): at android.support.v4.app.Fragment.performCreateView(Fragment

问题 I have a JTable and table model in a panel. I have check box in the table which should control another row to be editable and the other rows are data of food object. But when I click on check box I get java.lang.IndexOutOfBoundsException exception at this.bools.set(row, (Boolean)vlaue) ; line. Why do I get this error? import com.sun.org.apache.xpath.internal.operations.Bool; import Food; import FoodDAO; import javax.swing.*; import javax.swing.table.AbstractTableModel; import javax.swing

问题 I have an application of java swing . my purpose to print the elements of a an array into a JTextField but when I press a jbutton to do that I get the following exception Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 3 import javax.swing.*; import java.awt.*; import java.awt.event.*; public class Main extends JFrame implements ActionListener { /** * @param args the command line arguments */ JTextField jtext; JPanel panel; public Main() { jtext = new

问题 I have below SwingWorker for populate the jTable1. And i have button for executing this task. public class WorkerTime extends SwingWorker<Void, Void> { protected Void doInBackground() throws Exception { DefaultTableModel model1 = (DefaultTableModel) jTable1.getModel(); model1.setRowCount(0); for (int i = 0; i < 5; i++){ model1.addRow(new String[]{"a","a","a","a","a","a","a","a","a","a","a"}); model1.fireTableDataChanged(); } return null; } public void done() { } } First, second and sometimes