Question

1.

a. Write the Java code to fill a Java array of ints of size 100 with the value -1.

b. Write the Java code to create an ArrayList of Strings, and add the Strings "Just", "Do", "It!" to it.

Answer 1

//TestCodeA.java
public class TestCodeA {
    public static void main(String[] args) {
        int arr[] = new int[100];
        for(int i = 0;i<arr.length;i++){
            arr[i] = -1;
        }

        for(int i = 0;i<arr.length;i++){
            System.out.print(arr[i]+" ");
        }
    }
}

////////////////////////////////////////////////////////////////////

//TestCodeB.java
import java.util.ArrayList;
public class TestCodeB {
    public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        list.add("Just");
        list.add("Do");
        list.add("It!");

        for(int i = 0;i<list.size();i++){
            System.out.println(list.get(i));
        }
    }
}