why method isEmpty and isFull cannot be read??

[faeq eyqa]

i have make a coding of an arraylist..but when im compile it..it say that cannot find symbol isEmpty..can somebody tell me why..
here is my coding..

import javax.swing.*;
import java.util.*;

 class list
{
    protected int maxSize;
    protected int length;
    //protected DataElement [] list;
    String [] insertItem = new String[10];//wrapper class
    
    public list()
    {
        maxSize = 10;
        length = 0;
        insertItem = insertItem;
    }
    public list(int max)
    {
        maxSize = max;
        length = 0;
        insertItem = insertItem;
    }
    public boolean isEmpty()
    {
        return (length==0);
    }
    public boolean isFull()
    {
        return (length == maxSize);
    }
    public void insertAtFront(String str)
    {
        if(isEmpty == true)
        {
            insertItem[0]= str;
}
        else if(isFull== true)
            System.out.println(" an arraylist is full ");
        else
        {
            for(int i=length; i> 0; i--)
                insertItem[i] = insertItem[i-0];
        }
            insertItem[0]=str;
            length++;
    }
    public void display()
    {
        for (int i = 0; i< length; i++)
            System.out.print(insertItem[i]+" ");
    }
    public void insertAtBack(String str)
    {
        if(isEmpty == true)
            insertItem[length] = str;
        else if(isFull == true)
            System.err.println(" an arraylist full ");
        else
            insertItem[length] = str;
        length++;
    }
    
    public String getStr(String location)
    {
        return insertItem[location];
    }
    
    public static void main(String[] args)
    {
        System.out.println(" THIS IS AN ARRAYLIST WITH 10 ELEMENTS ");
        list stringlist = new list();
        
        if(stringlist.isEmpty == true)
            System.err.print(" NO ELEMENTS ");
        else if(stringlist.isFull == true)
            System.err.print(" FULL ");
            
            
        System.out.println(" the result is: ");
        System.out.println(" insert at front ");
        stringlist.insertAtFront("m");
        stringlist.insertAtFront("ak");
        stringlist.insertAtFront("an");
        stringlist.display();
        
        System.out.println(" insert at back ");
        stringlist.insertAtBack("o");
        stringlist.insertAtBack("t");
        stringlist.insertAtBack("ak2");
        stringlist.display();
    }
}

[Maneesh Godbole]

Welcome to the Ranch.
In your code, is isEmpty a method or a variable name? (Hint)
There are other problems with your code too, but we will come to that later

[Jelle Klap]

Hi, welcome to JavaRanch
I've edited your post to add code tags to make it more readable, please take the time to read about code tags in our FAQ entry here: UseCodeTags.

Now, as for your problem, you've defined a method called isEmpty(), but you're not actually calling it anywhere in your code eventhough you intended to do so.
Look carefully at lines 33, 54 and 73. Those aren't valid method calls.

Edit: ugh, beaten by Maneesh while making a coffee-run ;)