Question

Create a method:         Public Static boolean isSubArray489(int[] intArray)

This method has an array of integers as its input parameter, we'll say that a SubArray 9,8,7is that three integers, 9,8,7values appearing decreasing order one by one in the array. Return true if the array does contain any SubArray “987” Notice that any 3 integers that presenting a decreasing by one order must return True. (987, 876,765,654, 543, 432,321, 210 are all True)

Call this method in your main function, and pass in arrays like following:

Answer 1

public class SubArray {
        public static boolean isSubArray489(int[] intArray) {
                for(int i:intArray) {
                        if(isItValid(i))
                                return true;
                }
                return false;
        }
        private static boolean isItValid(int n) {
                int a=n%10;
                n=n/10;
                int b=n %10;
                n=n/10;
                int c=n;
                return (c-b==1 && b-a==1 && a<b && b<c);
                
        }
        public static void main(String[] args) {
                int arr[]= {987, 876,765,654, 543, 432,321, 210};
                System.out.println(isSubArray489(arr));
                int arr1[]= {123,436,534,651,455};
                System.out.println(isSubArray489(arr1));
        }
}

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