Question

JAVA HELP:

Directions

Write a program that will create an array of random numbers and output the values. Then output the values in the array backwards.

Here is my code, I am having a problem with the second method.

import java.util.Scanner;

import java.util.Random;

public class ArrayBackwards {

public static void main(String[] args) {

genrate();
print();

}

public static void generate() {

Scanner scanner = new Scanner(System.in);

   System.out.println("Seed:");

int seed = scanner.nextInt();

   System.out.println("Length");
int length = scanner.nextInt();

Random random = new Random();

int n = random.nextInt();
int array02[] = new int[n];

for(int i = 0; i < n; i++) {

}

}
public static void print() {

   for(int i: array02){
   System.out.println(i++);
   System.out.println(i--);
  
   }
}
}

Answer 1

Answer:

Here is the code and the related screenshots. Please go through the comments in the code for effective understanding of the program flow. Also, do drop me a comment if you have any doubts. I'll be glad to help you out. Thank you and Good Luck!!!

There where just few changes made, I have added a new method to display the array backwards. Also, I made the array02 as static. That's all, hope this helps.

Output:

Run: ArrayBackwards x /usr/lib/jvm/java-8-oracle/bin/java ... Seed : + → IR Seed :5 Length: 1 1 Length 5 Printing the array as is .. [@] - -1157408321 [1] - 758500184 [2] - 379066948 [3] - -1667228448 [4] - 2099829013 Printing the array backwards .. [@] - 2099829013 [1] - -1667228448 [2] - 379066948 [3] - 758500184 [4] - -1157408321 Process finished with exit code o

Please rely heavily on the screenshots below, as the formatting gets lost when I copy the code here.

Code:

import java.util.Random; import java.util.Scanner; public class ArrayBackwards { static int[] array02; public static void generate() { // Seed info System.out.println("Seed :"); Scanner scanner = new Scanner(System.in); int seed = scanner.nextInt(); System.out.println("Seed :" + seed); System.out.println("Length :"); // Length of the array int length = scanner.nextInt(); System.out.println("Length " + length); Random random = new Random(seed); // pass the seed here array02 = new int[length]; // pass the length here for(int i = 0; i < length; i++) { array02[i] = random.nextInt(); // store the items in the array } } public static void printArray() { // simply print the array System.out.println("\nPrinting the array as is ..\n"); for (int i=0; i<array02.length; i++){ System.out.println("[" + i + "] - " + array02[i]); } } public static void printArrayBackWards() { // print the array backwards System.out.println("\nPrinting the array backwards ..\n"); int j = 0; // Just for the display purpose, you can remove this var if not required for (int i = (array02.length -1); i>=0; i--){ System.out.println("[" + j++ + "] - " + array02[i]); } } public static void main(String[] args) { generate(); // random numbers gen printArray(); // regular print printArrayBackWards(); // backward print } }

import java.util.Random; import java.util.Scanner; 2 public class ArrayBackwards { static int[] array®2; public static void generate() { // Seed info System.out.println("Seed :"); Scanner scanner = new Scanner(System.in); int seed = scanner.nextInt(); System.out.println("Seed :" + seed); System.out.println("Length :"); // Length of the array int length = scanner.nextInt(); System.out.println("Length " + length); Random random = new Random(seed); // pass the seed here arrayo2 = new int[length]; // pass the length here for(int i = 0; i < length; i++) { arrayo2[i] = random.nextInt(); // store the items in the array public static void printArray() { // simply print the array System.out.println("\nPrinting the array as is .. \n"); for (int i=0; i<array®2.length; i++){ System.out.println("[" + i + "] - " + arrayo2[i]);

public static void printArrayBackwards() { // print the array backwards System.out.println("\nPrinting the array backwards .. \n"); int i = 0; // Just for the display purpose, you can remove this var if not required for (int i = (array02. length -1); i>=0; i--){ System.out.println("[" + j++ + "] - " + arrayo2[i]); public static void main(String[] args) { generate(); // random numbers gen printArray(); // regular print printArrayBackwards(); // backward print