indexoutofboundsexception

ListView random IndexOutOfBoundsException on Froyo

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问题 I have an app with tons of downloads and I'm receiving a lot of this error: 16783 AndroidRuntime E java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 16783 AndroidRuntime E at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257) 16783 AndroidRuntime E at java.util.ArrayList.get(ArrayList.java:311) 16783 AndroidRuntime E at android.widget.HeaderViewListAdapter.isEnabled(HeaderViewListAdapter.java:16 4) 16783 AndroidRuntime E at android.widget.ListView

java.lang.ArrayIndexOutOfBoundsException: 0

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问题 I am learning java using a book. There is this exercise that I can't get to work properly. It adds two doubles using the java class Double. When I try to run this code in Eclipse it gives me the error in the title. 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); } 回答1: Problem This ArrayIndexOutOfBoundsException: 0

Java substring: 'string index out of range'

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问题 I'm guessing I'm getting this error because the string is trying to substring a null value. But wouldn't the ".length() > 0" part eliminate that issue? Here is the Java snippet: if (itemdescription.length() > 0) { pstmt2.setString(3, itemdescription.substring(0,38)); } else { pstmt2.setString(3, "_"); } I got this error: java.lang.StringIndexOutOfBoundsException: String index out of range: 38 at java.lang.String.substring(Unknown Source) at MASInsert2.itemimport(MASInsert2.java:192) at

ArrayIndexOutOfBoundsException when launching a java program

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问题 I am currently working on an assignment but there seems to be a problem when running my code. public class caesar { public static void main(String args[]) { String inputString = args[0]; char inputArray[] = inputString.toCharArray(); int shiftLength = Integer.parseInt(args[1]); System.out.println("Input: " + inputString); String outputString = ""; This is the error I am receiving: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 at caesar.main(caesar.java:3) 回答1: You are

Images in SimpleCursorAdapter

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问题 I'm trying to use a SimpleCursorAdapter with a ViewBinder to get an image from the database and put it into my ListView item view. Here is my code: private void setUpViews() { mNewsView = (ListView) findViewById(R.id.news_list); Cursor cursor = getNews(); SimpleCursorAdapter curAdapter = new SimpleCursorAdapter( getApplicationContext(), R.layout.cursor_item, cursor, new String[] { "title", "content", "image" }, new int[] { R.id.cursor_title, R.id.cursor_content, R.id.news_image }); ViewBinder

JavaFX ComboBox change value causes IndexOutOfBoundsException

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问题 I want to include checks for my combobox to restrict \"access\" to some of the values. I could just remove those unaccessible items from the list, yes, but I\'d like the user to see the other options, even if he can\'t select them (yet). Problem: Selecting another value inside a changelistener causes an IndexOutOfBoundsException, and I have no idea why. Here is a SSCCE. It creates a ComboBox with Integer values, and the first one is selected on default. Then I tried to keep it very easy:

Initial size for the ArrayList

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You can set the initial size for an ArrayList by doing ArrayList<Integer> arr=new ArrayList<Integer>(10); However, you can't do arr.add(5, 10); because it causes an out of bounds exception. What is the use of setting an initial size if you can't access the space you allocated? The add function is defined as add(int index, Object element) so I am not adding to index 10. You're confusing the size of the array list with its capacity: the size is the number of elements in the list; the capacity is how many elements the list can potentially accommodate without reallocating its internal structures.

Why doesn't list have safe “get” method like dictionary?

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问题 Why doesn\'t list have a safe \"get\" method like dictionary? >>> d = {\'a\':\'b\'} >>> d[\'a\'] \'b\' >>> d[\'c\'] KeyError: \'c\' >>> d.get(\'c\', \'fail\') \'fail\' >>> l = [1] >>> l[10] IndexError: list index out of range 回答1: Ultimately it probably doesn't have a safe .get method because a dict is an associative collection (values are associated with names) where it is inefficient to check if a key is present (and return its value) without throwing an exception, while it is super trivial

Understand Arraylist IndexOutOfBoundsException in Android

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问题 I get a lot of IndexOutOfBoundsException from the any Arraylist I use. Most of the times it works fine but sometimes I get this annoying error on Arraylists i use on my project. The main cause is always either java.util.ArrayList.throwIndexOutOfBoundsException: Invalid index 3, size is 3 or java.util.ArrayList.throwIndexOutOfBoundsException: Invalid index 0, size is 0 Help me understand the main cause of this error as no matter how many answers I\'ve searched they don\'t completely help me.

Initial size for the ArrayList

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问题 You can set the initial size for an ArrayList by doing ArrayList<Integer> arr=new ArrayList<Integer>(10); However, you can\'t do arr.add(5, 10); because it causes an out of bounds exception. What is the use of setting an initial size if you can\'t access the space you allocated? The add function is defined as add(int index, Object element) so I am not adding to index 10. 回答1: You're confusing the size of the array list with its capacity: the size is the number of elements in the list; the