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Array list in Java - arraylist type error
2 Answer(s)      2 years and 4 months ago
Posted in : Java Beginners


I am using Array list in Java but when i compile i get array list type error. Can anyone please explain what is array list type error and why it occurs?


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May 10, 2012 at 2:58 PM


Type error occurs due to mismatch of data type. In this example, Arraylist is of Integer type - ArrayList<Integer>
Data Apple and Cherry are String type. So When you try to add String data into Integer type ArrayList, it will generate error.

In the same way when you try to add integer data into String type ArrayList ,error occurs.

Whenever you declare Arraylist type beware in the time of adding data.



May 10, 2012 at 2:58 PM


import java.util.*;
public class ArraylistTypeError {
  public static void main(String[] args) {
  ArrayList<Integer> list = new ArrayList<Integer>();


  list.add("Apple");
  list.add("Cherry");

 System.out.println(list);
}
}


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