Question

JAVA QUESTIONS:

1. Write a method called arrayTimesFive

• The method takes one array of doubles as a parameter
• It multiplies each element in the array by 5 and stores the result
• It returns nothing

2. Declare an array of Strings named plants and assign it the values rose, jasmine, daffodil

3. Write 5-6 lines of code to open a PrintWriter and write out the contents of the plants array into a text file named plants.txt

Answer 1

import java.io.FileNotFoundException;
import java.io.PrintWriter;

public class JavaQuestions {

    // 1
    public static void arrayTimesFive(double[] arr) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] *= 5;
        }
    }

    public static void main(String[] args) throws FileNotFoundException {
        // 2
        String[] plants = {"rose", "jasmine", "daffodil"};

        // 3
        PrintWriter pw = new PrintWriter("plants.txt");
        for (int i = 0; i < plants.length; i++) {
            pw.println(plants[i]);
        }
        pw.close();
    }
}