Question

In this assignment you will be writing multiple methods that work with arrays. These methods will perform specific functions and, in most cases, return results.

Your class should be named Grades.

Your program will have the following methods:

1. public static int maxValue(int[] arr)
2. public static int maxValue(int[] arr, int firstIndex, int lastIndex)
3. public static int indexOfFirstMaxValue(int[] arr)
4. public static int minValue(int[] arr)

Answer 1

public static int maxValue(int[] arr) {

if (arr.length == 0) return -1;

int max = arr[0];

for (int i=1; i<arr.length; i++) {

max = arr[i] > max ? arr[i] : max;

}

return max;

}

public static int maxValue(int[] arr, int firstIndex, int lastIndex) {

if (arr.length == 0) return -1;

int max = arr[firstIndex];

for (int i=firstIndex + 1; i<lastIndex; i++) {

max = arr[i] > max ? arr[i] : max;

}

return max;

}

public static int indexOfFirstMaxValue(int[] arr) {

if (arr.length == 0) return -1;

int max = arr[0];

int index = 0;

for (int i=1; i<arr.length; i++) {

if (max < arr[i]) {

index = i;

max = arr[i];

}

}

return index;

}

public static int minValue(int[] arr) {

if (arr.length == 0) return -1;

int min = arr[0];

for (int i=1; i<arr.length; i++) {

min = arr[i] < min ? arr[i] : min;

}

return min;

}