Java 2d changing values for user input

Question

This code generates a 3 X 5 2d array. I need to get the users input and replace all the generated values that are less than the users input to 100. Running this code does everything I need but I can't figure out how to get the users input to compare itself to the random values and determine if it is less to change it to 100.

import java.util.*;

public class secondArray {

   public static void main(String[] args) {
 
       int[][] array2 = new int[3][5];
  
       Random rand = new Random();
       Scanner input = new Scanner(System.in);
  
       for(int r = 0; r < array2.length; r++) {
           for( int c = 0; c < array2[r].length; c++) {
               array2[r][c] = rand.nextInt(50-20 +1)+20;
           }
       }
       System.out.println("The first array is: ");
  
       for(int r = 0; r < array2.length; r++) {
           for( int c = 0; c < array2[r].length; c++) {
               System.out.print(array2[r][c] + " ");
           }
           System.out.println();
       }
       System.out.println("\nEnter a number for x: ");
       int x;
       x = input.nextInt();
       System.out.println("\nArray after changing numbers less than "+ x +" :");

    }
}

Hint: You will have to look into the array using the for loops, very similarly as you did twice already. In the for loops, you can compare (and replace) the value in the array. You will be comparing it with the value from input. — Ecto
– Ecto, Commented Sep 19, 2020 at 22:22

benlyazid · Accepted Answer · 2020-09-19 23:01:51Z

1

public class secondArray {

public static void main(String[] args) {

   int[][] array2 = new int[3][5];
   //make read user input in top of the function
   x = input.nextInt();

   Random rand = new Random();
   Scanner input = new Scanner(System.in);

   for(int r = 0; r < array2.length; r++) {
       for( int c = 0; c < array2[r].length; c++) {
          //Here where are comparing the input and the random number
           int r = rand.nextInt(50-20 +1)+20;
           if(r >= x)
              array2[r][c] = r;
           else:
             array2[r][c] = 100;
       }
   }
   System.out.println("The first array is: ");

   for(int r = 0; r < array2.length; r++) {
       for( int c = 0; c < array2[r].length; c++) {
           System.out.print(array2[r][c] + " ");
       }
       System.out.println();
   }
   System.out.println("\nEnter a number for x: ");
   int x;
   System.out.println("\nArray after changing numbers less than "+ x +" :");
   }
}

edited Sep 19, 2020 at 23:01

answered Sep 19, 2020 at 22:36

benlyazid

1021 silver badge9 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

RickyBobby Over a year ago

I appreciate your comment, but how does your if/ else statement work?

benlyazid Over a year ago

if the random number > than input numbet then insert the random number else insert (i make a mestake replace x with 100)

Collectives™ on Stack Overflow

Java 2d changing values for user input

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related