ArrayList IndexOutOfBounds

[graympa]

I can't figure out what the problem is. Not sure if this isn't a scanner problem.
I get an Index out of bounds error when I run this; what really confuses me is I don't print my "here" msg on line 45; don't know why it skips it. Any pointers or advice greatly appreciated.

package test;

public class Main {

    public static void main(String[] args) {
        Chapter chap = new Chapter();
        CardTemplates temp = new CardTemplates();
        temp = chap.SelectTemplate();
    }

}

package test;
import java.util.*;
import java.io.Serializable;

public class Chapter implements Serializable{

    ArrayList<CardTemplates> ct;

    public Chapter()
    {
        ct = new ArrayList<CardTemplates>();
    }

    public CardTemplates SelectTemplate()
    {
        Scanner sc = new Scanner(System.in);
        int x;
        System.out.print("type any letter to create a template  ");

            sc.nextLine();
            //create a new template
            String a;
            String b;
            String c;
            String d;
            String e;
            String f;
            System.out.print("Name of template ");
            a=sc.nextLine();
            System.out.print("Front ");
            b=sc.nextLine();
            System.out.print("fwd ");
            c=sc.nextLine();
            System.out.print("Back ");
            d=sc.nextLine();
            System.out.print("bkwd ");
            e=sc.nextLine();
            System.out.print("note ");
            f =sc.nextLine();
            System.out.print("here");
            ct.add(new CardTemplates( a,b,c,d,e,f));
            x=ct.size();

        return ct.get(x);

    }
}


package test;

import java.util.*;
import java.io.Serializable;

public class CardTemplates implements Serializable{

    private String first;
    private String second;
    private String third;
    private String fourth;
    private String fifth;
    private String templateName;

    public CardTemplates()
    {
        first="";
        second="";
        third="";
        fourth="";
        fifth="";
        templateName = "default";
    }

    public CardTemplates(String tN, String f1, String f2, String f3, String f4, String f5)
    {
        templateName=tN;
        first = f1;
        second = f2;
        third = f3;
        fourth = f4;
        fifth = f5;
    }

    public void setTName(String s)
    { templateName=s;}

    public void setFirst(String s)
    { first=s;}


    public void setSecond(String s)
    { second=s;}

    public void setThird(String s)
    { third=s;}

    public void setFourth(String s)
    { fourth=s;}

    public void setFifth(String s)
    { fifth=s;}

    public String getTName()
    { return templateName; }

    public String getFirst()
    { return first; }

    public String getSecond()
    { return second; }

    public String getThird()
    { return third; }

    public String getFourth()
    { return fourth; }

    public String getFifth()
    { return fifth; }



    public String toString()
    {
        return String.format(first+" "+second+" "+third+" \n"+fourth+" "+fifth);
    }

}

[Toll]

Could we get a stacktrace of the exception, please?

[Toll]

Although I might've figured it out anyway... I'm fairly certain that the exceptions happens at this line:

        return ct.get(x);

Look around that line and see if you can figure it out.

[graympa]

But why do I get an array out of bounds error and I'm not using an array at the time?

[Toll]

Well, you _are_ using an ArrayList, which has an array as the underlying structure.

[Junky]

You are using an ArrayList, like the name suggests it uses an array.

You set x to be the size of the array an then try to get the item at size. Just like normal arrays if you have 5 items the valid indicies are 0 - 4, making 5 out of bounds.

[graympa]

Thanks. You were right the problem was my array index was size, not size-1. I was confused because the error was occurring at the println code, not the array operation following. Maybe it is a pipeline issue.

[dinesh.guntha]

you use ct.get(x-1) it will not get ArrayIndexOutBoundExcepation