Answer to Question #289019 in Java | JSP | JSF for Hamza

Question

Task #2: Arrays and Methods

In this task, you are being asked to write a method that manipulates an array in Java.

Write a method called printPrimes that accepts one integer array as argument and print

all the prime numbers form the array.

You may use the following header for this method:

static void printPrimes(int[] array)

For example, if you pass {2, 4, 31, 12, 7, 47, 63, 41, 67, 55} to this

method, then the method should print 2, 31, 7, 47, 41, 67, as prime numbers.

To help with finding a prime number, the printPrimes() method would call another method:

static boolean isPrime(int number)

that takes an integer as an argument, and returns true if that number is a prime, otherwise,

returns false.

NOTE: Declare and initialize the array without taking input from user.

1. Create a program called ArrayPrintPrimesLab2.java

2. Correctly display appropriate messages.

Answer 1

package com.task;

public class ArrayPrintPrimesLab2 {

    public static void main(String[] args) {
        int[] array = {2, 5, 8, 13, 15, 28, 36, 37, 41, 49, 58};

        printPrimes(array);
    }

    static void printPrimes(int[] array) {
        System.out.println("Prime numbers are:");
        for (int i = 0; i < array.length; i++) {
            if (isPrime(array[i])) {
                System.out.print(array[i] + " ");
            }
        }
    }

    static boolean isPrime(int num) {
        for (int i = 2; i < num; i++) {
            if ((num % i) == 0) {
                return false;
            }
        }

        return true;
    }

}