reading in Daa from a text file
I keep getting an Exception in thread "main"
java.lang.ArrayIndexOutOfBoundsException: 2 >= 2
at java.util.Vector.elementAt(Unknown Source)
at BldList.main(BldList.java:51)
Can anyone help me with resolving this issue?
import java.util.Vector;
import java.io.*;
import java.util.*;
public class BldList
{
public static void main(String[] args)
throws FileNotFoundException
{
Vector<Integer> numList = new Vector<Integer>(20);
Scanner inFile = new Scanner(new FileReader("f:\\Numbers.txt"));
PrintWriter outFile = new PrintWriter("f:\\Number.out");
int number;
number = inFile.nextInt();
numList.addElement(new Integer(number));
System.out.println();
System.out.println("Your unsorted values:\n");
//above line converts primitive int to an object and adds it to the
vector
boolean inserted = false;
/*to add the Integer objects in sorted order, you loop from 1 to 20:
*/
for (int insert = 1; insert < 20; insert++)
number = inFile.nextInt();//reads it in.
/* Use an inner loop to loop from 0 to numList.size(). In this loop
you will compare each object in the vector
with the one you are trying to inset to find the proper positin for
it*/
for (int loop = 0; loop < numList.size(); loop++)
{
Integer temp = (Integer)numList.elementAt(loop);//retrieves Objeect
at the position 'loop'
if (temp.intValue() > number) //compares number to the integer
equivalent of temp
{
numList.insertElementAt(new Integer(number),loop); //inserts
into corrrect place
inserted = true; // you've found it so set inserted to true
break;// break out of loop once number's been inserted
}
}
/* Once the for loop is done, check to see if you've inserted the
item.
If not, it must be bigger than everything in the vector so insert it
at the end*/
if (!inserted) numList.addElement(new Integer(number)); // adds at
end
/*Once the vector has been populated in sorted order, then print it
out using the
elementAt method. Use a for loop that iterates fron 1 to 20. Don't
forget to cast it to an Integer
before printing.*/
for (int count = 1; count <= 20; count++)
System.out.println((Integer)numList.elementAt(count));//To cast it
to an integer and Print it out.
inFile.close();
outFile.close();
}
}