Practice›Java Fundamentals›Module 5. Arrays & Lists›5.3 Lists

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5.3 Lists — replace first

Total: 0 / 3 pts

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Task

Fill in replaceFirst so that it replaces the element at index 0 with the new value, leaving the rest untouched.

The program prints [new, keep]. Use set, not add.

Your solution

import java.util.ArrayList;

public class Main {

    public static void replaceFirst(ArrayList<String> list, String val) {
        // replace the element at index 0

    }

    public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<String>();
        list.add("old");
        list.add("keep");
        replaceFirst(list, "new");
        System.out.println(list);
    }
}

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