[FIXED] How to remove the last string in an array element using parameters of another method named removeLast()

Issue

Here is the question of exercise and my code:

Create the method public static void removeLast(ArrayList strings) in the exercise template. The method should remove the last value in the list it receives as a parameter. If the list is empty, the method does nothing.

public static void main(String[] args) {
    // Try your method in here
    ArrayList<String> arrayList = new ArrayList<>();
    arrayList.add("First");
    arrayList.add("Second");
    arrayList.add("Third");
    System.out.println(arrayList);
    removeLast(arrayList);
    System.out.println(arrayList);
}

public static void removeLast(ArrayList<String> strings) {
    strings.remove("Second");
    strings.remove("Third");
}

The sample output should look similar to the following:

[First, Second, Third]
[First]

What does the exercise mean by if the list is empty, the method does nothing?

I also keep getting error from local test saying the following:

removeLast method should remove the last element of the list.

Could someone help please?

Solution

"If the list is empty, the method does nothing" --> Check if the list is empty or not, if empty just return nothing , else delete last element(as per your requirement)

Example:

public static void removeLast(ArrayList<String> strings) {
        
        if( (strings.isEmpty())) {
         return;
        } 
        else {
            strings.remove(strings.size()-1);
            
        }
        
    
    }

Answered By - user19856836
Answer Checked By - Robin (JavaFixing Admin)