Finding minimum and maximum in Java 2D array

Question

I have been trying to figure this out for a while and need some help. I need to find the min/max values and print them out for a multidimensional array. Here are the two way

Answer 1

Your problem is: You are sorting the array of int arrays instead of sorting each individual int in each int array.

To solve this: Loop through each int array in the array of int arrays.

Instructions for finding the maximum and minimum of a 2D int array using Arrays.sort():

1. Declare a 2D int array to sort called data.
2. Declare two ints, one to hold the maximum value, the other the minimum value.
   • The initial value of the maximum should be Integer.MIN_VALUE and the initial value of the minimum should be Integer.MAX_VALUE to make sure that negative values are handled.
3. Loop through data from 0 to data.length:
   1. Sort data[i]
   2. Check if the first value of data[i] is less than the minimum and change it if it is.
   3. Check if the last value of data[i] is greater than the maximum and change it if it is.
4. Output your result.

Example:

import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        int[][] data = {{3, 2, 5},
            {1, 4, 4, 8, 13},
            {9, 1, 0, 2},
            {0, 2, 6, 3, -1, -8} };

        int maximum = Integer.MIN_VALUE;
        int minimum = Integer.MAX_VALUE;

        for(int i = 0; i < data.length; i++) {
            Arrays.sort(data[i]);

            if(data[i][0] < minimum) minimum = data[i][0];
            if(data[i][data[i].length - 1] > maximum) maximum = data[i][data[i].length - 1];
        }

        System.out.println("Minimum = " + maximum);  
        System.out.println("Maximum = " + minimum); 
    }
}