IndexOutOfBoundsException need some help please...

[j4sbass]

Im writing some code where I am just trying to move an object with keys right now. I can display it and move it, but it seems to randomly stop and receive and error wile doing so:
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 11, Size: 1
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at Input.getKey(Input.java:24)
at GameObject.Update(GameObject.java:45)
at Game.run(Game.java:26)
at Main.main(Main.java:8)

Index and size are rarely the same 2 numbers, Ive seen it go as high as 72 and as low as 0. Heres the code where the problem is, i have KeyAdapter attached to my JFrame, the error highlights on line 8, this line of my getKey() function:
if (getInputBuffer().get(i) != null && getInputBuffer().get(i).getKeyCode() == asciiCode)

public static boolean getKey(int asciiCode)
	{
		getInstance();
		for(int i = getInputBuffer().size() - 1; i >= 0; i--)
		{
			if (i >= 0 && i < getInputBuffer().size())
			{
				if (getInputBuffer().get(i) != null && getInputBuffer().get(i).getKeyCode() == asciiCode)
				{
					return true;
				}
			}
		}
		return false;
	}
	
	public void keyPressed(KeyEvent e)
	{
		getInputBuffer().add(e);
	}
	
	public void keyReleased(KeyEvent e)
	{
		for(int i = getInputBuffer().size() - 1; i >= 0; i--)
		{
			if (e.getKeyCode() == getInputBuffer().get(i).getKeyCode())
			{
				getInputBuffer().remove(i);
			}
		}
	}
	
	public static Input getInstance()
	{
		if (instance == null)
			{
				instance = new Input();
			}
		return instance;
	}
	
	public static List<KeyEvent> getInputBuffer()
	{
		if(inputBuffer == null)
		{
			inputBuffer = new ArrayList<KeyEvent>();
		}
		return inputBuffer;
	}

any help please?

[j4sbass]

I changed it to using an array list and it worked for a wile, but now it just takes longer to glitch out. still will do it every once in a wile.

any suggestions?

[taherrah]

I am taking a grad class in Java using threads, I am getting this same error message i am posting my code below and the output message. If anyone can help
My code:
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Sort{ //start of the sort class
private static String[] arrThread;
/**
* You are to implement this method. The method should invoke one or more
* threads to read and sort the data from the collection of Files. The
* method should return a sorted list of all of the String data contained
* in the files.
* @param files
* @return
* @throws IOException
*/


public static String[] threadedSort(File[]files)throws IOException {
//Defining and Starting a thread
{
Thread T;
T = new Thread(new someMethod("Parameter s"));
T.start(); //Starts the thread process
try{
T.join();
}
catch(InterruptedException ex){
Logger.getLogger(Sort.class.getName()).log(Level.S EVERE,null,ex);
}

String[] arrThread = new String[0]; // initialized arrThread
System.out.println("File value at index: " + arrThread);
//code to print out results from sorted files

return arrThread;

}
}
public static class someMethod extends Thread{ //this is a constructor call
String s;
someMethod (String str)
{
s = str;
System.out.println("Hello");
}

@Override
@SuppressWarnings("empty-statement")
public void run() {
int n = 0;
System.out.println(file());
//if file() returns a printable value then this is correct T.yield();
for(int i=0; i<(n-1); i++)
{
System.out.println(file());

}
//throw new UnsupportedOperationException("Not supported yet.");
}

private boolean file() {
return false;
//throw new UnsupportedOperationException("Not yet implemented");
}
}

/**
* Given an array of files, this method will return a sorted list of the String data contained in each of the files.
*
* @param files the files to be read
* @return the sorted data
* @throws IOException thrown if any errors occur reading the file
*/
public static String[] sort(File[] files) throws IOException {

String[] sortedData = new String[0];

for (File file : files) {
String[] data = getData(file);
data = MergeSort.mergeSort(data);
sortedData = MergeSort.merge(sortedData, data);
}

return sortedData;

}

/**
* This method will read in the string data from the specified file and return the data as an array of String objects.
*
* @param file the file containing the String data
* @return String array containing the String data
* @throws IOException thrown if any errors occur reading the file
*/
private static String[] getData(File file) throws IOException {

ArrayList<String> data = new ArrayList<String>();
BufferedReader in = new BufferedReader(new FileReader(file));

// Read the data from the file until the end of file is reached
while (true) {
String line = in.readLine();
if (line == null) {
// the end of file was reached
break;
}
else {
data.add(line);
}
}

//Close the input stream and return the data
in.close();
return data.toArray(new String[0]);

}

private static class printable {

public printable() {
}
}

private static class is {

public is() {
}
}
}

Output file
run:
The data returned by Sort.sort is sorted
Hello
false
File value at index: [Ljava.lang.String;@2b49a2c8
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at SortTest.main(SortTest.java:24)
Java Result: 1
BUILD SUCCESSFUL (total time: 1 second)