Implement a class named RandNum. The class should have a 5x5 2D array of 25 integers. The constructor should use the random() function to generate a random number in the range of 1 to 100 for each element in the array. Implement a method to calculate the minimum, maximum and average of the 25 values. Implement a method to display the values of the array, minimum, maximum and average of the 25 values.

Question:

Implement a class named RandNum. The class should have a 5x5 2D array of 25 integers. The constructor should use the random() function to generate a random number in the range of 1 to 100 for each element in the array. Implement a method to calculate the minimum, maximum and average of the 25 values. Implement a method to display the values of the array, minimum, maximum and average of the 25 values.

Model Answer:

Java

  
  	public class RandNum {
    
    int minValue;
    int maxValue;
    int sum;
    double average;
    
    int[][] arr = new int[5][5];
    
    public RandNum(){
        
        int max = 100;
        int min = 1;
        int range = max - min + 1;
        
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 5; j++) {
                arr[i][j] = (int)(Math.random() * range) + min;
            }
        }    
    }
    
    public void calculateValues(){
        maxValue = arr[0][0];
        for (int j = 0; j < arr.length; j++) {
            for (int i = 0; i < arr[j].length; i++) {
                if (arr[j][i] > maxValue) {
                    maxValue = arr[j][i];
                }
            }
        }
        
        
        minValue = arr[0][0];
        for (int j = 0; j < arr.length; j++) {
            for (int i = 0; i < arr[j].length; i++) {
                if (arr[j][i] < minValue ) {
                    minValue = arr[j][i];
                }
            }
        }
        
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 5; j++) {
                sum += arr[i][j];
            }
        }
        
        average = sum/25.0;
    }
    
    public void displayValues(){
        
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 5; j++) {
                System.out.print(arr[i][j] + " ");
            }
            System.out.println("");
        }
        
        System.out.println("");
        System.out.println("Maximum Value: " + maxValue);
        System.out.println("Minimum Value: " + minValue);
        System.out.println("Average: "+ average );
    }

    public static void main(String[] args) {
        RandNum randNum = new RandNum();
        
        randNum.calculateValues();
        randNum.displayValues();
    }
    
}

Output:

  
  15 72 28 62 19 
  65 56 90 16 45 
  35 69 55 27 54 
  28 86 10 54 71 
  46 11 6 5 91 

  Maximum Value: 91
  Minimum Value: 5
  Average: 44.64