What is the Syntax for creating Generic Arraylist in JDK12?

Question

Currently facing issue as "The type ArrayList is not generic; it cannot be parameterized with arguments " with the below Syntax

ArrayList<String> ls= new ArrayList<String>();

If i try to use non generic type syntax , then it's giving me error while calling add method that add is not defined with the below code

ArrayList ls= new ArrayList();
ls.add("ABC");

These problems make it sound like you're importing the wrong `ArrayList` class, or that you've defined a class named `ArrayList` that is conflicting with the `java.util` one. — Louis Wasserman, Jul 27 '20 at 19:44
Thanks Louis, I have defined a class named Arraylist which was not allowing me to define generic statement. — Priya, Jul 29 '20 at 06:56

score 1 · Accepted Answer · answered Jul 27 '20 at 19:53

Check your import statements to be sure that you are using the proper ArrayList as shown here.

Your code:

ArrayList<String> ls = new ArrayList<String>();

Is valid syntax for declaring an ArrayList.

Additionally, as @Louis Wasserman mentioned in a comment, be sure that you do not have any conflicting user-defined ArrayList classes.

The generic code:

ArrayList ls= new ArrayList();
ls.add("ABC");

Does not have many uses, you should always have a type for your array list as explained here.

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