Syntax Error

What This Error Means

This error occurs when the Java compiler cannot find a method declaration in the class or interface that you are trying to use. In this case, the error message indicates that the compiler is looking for a method get(int) in the ArrayList class but cannot find it.

Why It Happens

This error typically happens when you are trying to use a method that does not exist in the class or interface, or when you are using a parameter or return type that is not correct. In the case of the ArrayList class, it does not have a method get(int). You can use the get(int) method in the List interface, but not in the ArrayList class.

How to Fix It

1. 1To fix this error, you need to change the line of code that is causing the error. In this case, you can change ArrayList to List, which implements the get(int) method. Here is the corrected code:
2. 2// Before (broken code)
3. 3ArrayList<Integer> numbers = new ArrayList>();
4. 4int num = numbers.get(0);
5. 5// After (fixed code)
6. 6List<Integer> numbers = new ArrayList>();
7. 7int num = numbers.get(0);

Example Code Solution

ArrayList<Integer> numbers = new ArrayList>();
int num = numbers.get(0);

List<Integer> numbers = new ArrayList>();
int num = numbers.get(0);