How to Find Minimum Value in 2d Array Java

How to Find Minimum Value in 2d Array Java | The 2d array is a two-dimensional matrix. On this page, we will find the minimum value in the two-dimensional matrix. In order to do this, we need to create a method as there is no built-in method or function to find the minimum value in the given matrix.

See the below examples to may get more ideas about the problem.

Example-1:-
Array = { { 1, 2 }, { 4, 5 }, { 7, 8 } };
Minimum value in 2d array = 1

Example-2:-
Array = { { 100, 105, 300 }, { 104, 50, 603 }, { 745, 813, 999 } };
Minimum value in 2d array = 50

Example-3:-
Array = {{ }};
There are no elements in the array.

If there are no elements in the array that is if the row value or column value is equal to 0 then the code returns “there are no elements in the array”.

Find Minimum Value in 2d Array Java

Now let us see a program to find minimum value in 2d array Java. Note:- We are assuming that the input array will not be a jagged array.

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

class Main {
   public static void main(String[] args) {

      Scanner scan = new Scanner(System.in);
      System.out.print("Enter the number of elements in a row: ");
      int n = scan.nextInt();
      System.out.print("Enter the number of elements in a column: ");
      int m = scan.nextInt();
      int[][] array = new int[n][m];

      if (n == 0 || m == 0) {
         System.out.println("There are no elements in the"+
                            " given 2d array.");
      } else {
         System.out.println("Enter the elements for the 2d array: ");
         for (int i = 0; i < n; i++) {
            for (int j = 0; j < m; j++) {
               array[i][j] = scan.nextInt();
            }
         }

         System.out.println("2D array = " + 
                             Arrays.deepToString(array));
         System.out.println("The minimum value in the given"+
              " 2d array is: " + getMinimumIn2DArray(array));
      }
      scan.close();
   }

   public static int getMinimumIn2DArray(int[][] number) {
      int minimum = number[0][0];
      for (int j = 0; j < number.length; j++) {
         for (int i = 0; i < number[j].length; i++) {
            if (number[j][i] < minimum) {
               minimum = number[j][i];
            }
         }
      }
      return minimum;
   }
}

Output:-

Enter the number of elements in a row: 2
Enter the number of elements in a column: 2
Enter the elements for the 2d array:
15 10 20 25
2D array = [ [15, 10], [20, 25] ]
The minimum value in the given 2d array is: 10

Enter the number of elements in a row: 3
Enter the number of elements in a column: 3
Enter the elements for the 2d array:
15 484 5464 12 326 114 6565 45 9
2D array = [ [15, 484, 5464], [12, 326, 114], [6565, 45, 9] ]
The minimum value in the given 2d array is: 9

Test case where there are no elements in the array:-

Enter the number of elements in a row: 0
Enter the number of elements in a column: 0
There are no elements in the given 2d array.

In the above program to find minimum value in 2d array Java, to display the two-dimensional array we have used Arrays.deepToString() method. In Java, Arrays class contains many buit-in methods like Arrays.toString(), Arrays.sort(), Arrays.copyof(), Arrays.copyOfRange(), Arrays.fill(), Arrays.equals(), and more to solve array & matrix related problems.

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