access array from arraylist

Question

I have the following arraylist

ArrayList<AnotherClass> exmapleName = new ArrayList<AnotherClass>();
// AnotherClass is a class I created, I store objects of the class in this array, the code to this doesn't matter this works.

Inside of exampleName I have different types of data

public AnotherClass (String someString, int someInt, int anotherInt, int[] intArray, ArrayList<Integer> arrayList)
//Header of the constructor

Now what I need to do is access and store arrayList[0]. But I need to do it once the object has been created so there is actually something inside arrayList.

This is what I've tried but doesn't seem to work

 public static void main(String[] args) {
 TestClass obj = new TestClass();
 obj.read(); //reads file
 testMethod();

}

 public void testMethod(){
 AnotherClass test1 = exampleName.get(1);
 ArrayList<Integer> test2 = test1.arrayList;
 int test3 = test2.arrayList[0];

} // I broke it down into separate lines to make it more understandable

compiler errors are as follows

cannot find symbol
 int test3 = test2.arrayList[0];
symbol: variable arrayList
location: variable test2 of type ArrayList<Integer>

1 error

Answer 1

Change

int test3 = test2.arrayList[0];

to

int test3 = test2.get(0);

You use brackets to access arrays' elements, & the .get method of an ArrayList to access its elements.

• ugCode: Much appreciated it worked, I was so close but so far
• ugCode: @ Sparta - You use brackets to access arrays' elements, & the .get method of an ArrayList to access its elements. ----- I thought because I'm trying to access a normal array though you use [ ] why do you have to use get?
• Mohammed Aouf Zouag: Well, test2 is an ArrayList of Integers; so there is no such thing as test2.arrayList. Also, you can't do test2[0].
• ugCode: ah of course I made a silly mistake, I confused myself with another class of mine thanks for the help