Need to find the Median in JAVA import java.util.Arrays; class Main { public sta

Question

Need to find the Median in JAVA

import java.util.Arrays;   
class Main
{   
public static void main (String args [ ])
{
int numbers [ ] = {1,5,-9,12,-3,89, 18,23,4,-6};
// Find minimum (lowest) value in array using loop

System.out.println("Minimum Value = " + getMinValue(numbers));
// Find maximum (largest) value in array using loop

System.out.println("Maximum Value = " + getMaxValue(numbers));
          
              // Find average value in array using loop

       System.out.println("Average Value = " + getAvgValue(numbers));

// Add any challenge method calls here ....

  
       Arrays.sort(numbers);
       // Print the sorted array
       System.out.println( "The sorted array: ");
       for (int i = 0; i < numbers.length; i++)
   {  
           System.out.println (numbers[i]);
}
}   

// Find maximum (largest) value in array using loop   
public static int getMaxValue ( int [ ] numbers ) {

int maxValue = numbers [0];   

// Access each array element starting with the second element
for (int i = 1; i < numbers.length; i++){
if (numbers [ i ] > maxValue) { // is the current element greater than the current max value?
maxValue = numbers [ i ]; // the current element is now the max value
} // end if
} // end for

return maxValue; // return the largest array element value

} // getMaxValue

// Find minimum (lowest) value in array using loop
public static int getMinValue( int [ ] numbers) {

int minValue = numbers [ 0 ];
  
// Access each array element starting with the second element
for (int i = 1; i < numbers.length; i++){
if (numbers [ i ] < minValue) { // is the current element less than the current min value?
minValue = numbers [ i ]; // the current element is now the min value
} // end if
} // end for

return minValue;

} // getMinValue

// Find the average of an array of integers

public static double getAvgValue ( int [ ] numbers) {

double average = 0;
double sum = 0;

//ADD CODE TO ADD A LOOP TO COMPUTE A RUNNING TOTAL OF ALL ARRAY ELEMENTS

for (int i = 0; i < numbers.length; i++) {
sum = sum + numbers [ i ];
} // end for

// ADD CODE TO COMPUTE THE AVERAGE
average = sum / numbers.length;
return average;

} // getAvgValue

// Add any Challenge methods here ...

} // Main Class

Explanation / Answer

import java.util.Arrays;

class Main {
   public static void main(String args[]) {
       int numbers[] = { 1, 5, -9, 12, -3, 89, 18, 23, 4, -6 };
       // Find minimum (lowest) value in array using loop
       System.out.println("Minimum Value = " + getMinValue(numbers));
       // Find maximum (largest) value in array using loop
       System.out.println("Maximum Value = " + getMaxValue(numbers));

       // Find average value in array using loop
       System.out.println("Average Value = " + getAvgValue(numbers));
       // Add any challenge method calls here ....

       Arrays.sort(numbers);
       // Print the sorted array
       System.out.println("The sorted array: ");
       for (int i = 0; i < numbers.length; i++) {
           System.out.print(numbers[i] + " ");
       }

       System.out.println(" Median of the Array: " + getMedian(numbers));

   }

   /**
   * method to find median of an array
   *
   * @param numbers
   * @return
   */
   public static double getMedian(int[] numbers) {

       int middle = numbers.length / 2;
       if (numbers.length % 2 == 0) {
           int left = numbers[middle - 1];
           int right = numbers[middle];
           return (left + right) / 2.0;
       } else {
           return numbers[middle];
       }
   }

   // Find maximum (largest) value in array using loop
   public static int getMaxValue(int[] numbers) {

       int maxValue = numbers[0];

       // Access each array element starting with the second element
       for (int i = 1; i < numbers.length; i++) {
           if (numbers[i] > maxValue) { // is the current element greater than
                                           // the current max value?
               maxValue = numbers[i]; // the current element is now the max
                                       // value
           } // end if
       } // end for
       return maxValue; // return the largest array element value
   } // getMaxValue

   // Find minimum (lowest) value in array using loop
   public static int getMinValue(int[] numbers) {
       int minValue = numbers[0];

       // Access each array element starting with the second element
       for (int i = 1; i < numbers.length; i++) {
           if (numbers[i] < minValue) { // is the current element less than the
                                           // current min value?
               minValue = numbers[i]; // the current element is now the min
                                       // value
           } // end if
       } // end for
       return minValue;

   } // getMinValue

   // Find the average of an array of integers
   public static double getAvgValue(int[] numbers) {
       double average = 0;
       double sum = 0;

       // ADD CODE TO ADD A LOOP TO COMPUTE A RUNNING TOTAL OF ALL ARRAY
       // ELEMENTS
       for (int i = 0; i < numbers.length; i++) {
           sum = sum + numbers[i];
       } // end for
           // ADD CODE TO COMPUTE THE AVERAGE
       average = sum / numbers.length;
       return average;
   } // getAvgValue
       // Add any Challenge methods here ...
} // Main Class

OUTPUT:

Minimum Value = -9
Maximum Value = 89
Average Value = 13.4
The sorted array:
-9 -6 -3 1 4 5 12 18 23 89
Median of the Array: 4.5

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