Question

JAVA Programming

Produce a method that reads in a set of values (double) from the user and returns them. Use this header:

public static double[] getNumsFromUser(String msg1, String msg2)

The implementation of the method should start with a message to input the total number of array elements, followed by a message to enter all the array elements. The method returns the array of elements. The two strings msg1 and msg2 that are passed to the method as parameters will be the two messages that tell the user what to do.

In the main class, use the following program outline to test this method: public class Q1 { public static void main(String[] args) { String s1 = "Enter number of students: "; String s2 = "Enter student grades: "; double[] numbers = getNumsFromUser(s1, s2); System.out.println(Arrays.toString(numbers)); } public static double[] getNumsFromUser(String msg1, String msg2){ //your code goes here } } - [10 marks] Produce a method that reads in a set of values (double) from the user and returns them. Use this header: public static double[] getNumsFromUser (String msg1, String msg2) The implementation of the method should start with a message to input the total number of array elements, followed by a message to enter all the array elements. The method returns the array of elements. The two strings msg1 and msg2 that are passed to the method as parameters will be the two messages that tell the user what to do. In the main class, use the following program outline to test this method: public class Q1 { public static void main(String[] args) { String s1 = "Enter number of students: "; String s2 = "Enter student grades: "; double[] numbers = getNums FromUser(s1, s2); System.out.println(Arrays.toString(numbers)); public static double[] getNums FromUser(String msgi, String msg2){ //your code goes here Sample run Enter number of students: 4 Enter student grades: 12.5 23 11.5 27 [12.5, 23.0, 11.5, 27.0]

Answer 1

import java.util.Arrays;
import java.util.Scanner;

public class Q1 {
public static void main(String[] args) {
String s1 = "Enter number of students: ";
String s2 = "Enter student grades: ";
double [] numbers = getNumsFromUser(s1,s2);
System.out.println(Arrays.toString(numbers));
}

public static double[] getNumsFromUser(String msg1, String msg2) {
Scanner sc = new Scanner(System.in); // to take input
System.out.print(msg1); // print msg
int size = sc.nextInt(); // take size
double numbers[] = new double[size]; // create array
System.out.print(msg2); // print msg
for (int i = 0; i < numbers.length; i++) { // take input
numbers[i] = sc.nextDouble();
}
return numbers; // return array
}
  
}

import java.util.Arrays; import java.util.Scanner; public class Q1 { public static void main(String[] args) { String sl = "Enter number of students: "; String 32 = "Enter student grades: "; double [] numbers = getNums FromUser(31, 32); System.out.println (Arrays.toString (numbers)); public static double[] getNumsFromUser (String msgi, String msg2) Scanner sc = new Scanner (System.in); // to take input System.out.print (msgl); // print msg int size = sc.nextInt(); // take size double numbers[] = new double[size]; // create array System.out.print (msg2); // print msg for (int i = 0; i < numbers.length; i++) { // take input numbers[i] = sc.nextDouble(); return numbers; // return array

/* OUTPUT */

run: Enter number of students: 4 Enter student grades: 12.5 23 11.5 27 [12.5, 23.0, 11.5, 27.01 BUILD SUCCESSFUL (total time: 30 seconds)