java 2 chapter 7 solve problems part one(Arabic) смотреть онлайн

Tutorial 3 (Arrays: advanced)
1. [array as parameter of a method] Write a Java class with the following reusable static methods:
a. A method named sumEven that accepts as parameter an array of integers named a1. The
method returns the sum of all even numbers in the array a1.
b. A method named averageNegative that accepts as parameter an array of doubles named
list. The method returns the average of all negative numbers in the array list.
c. A method named countTens that accepts as parameter an array of students’ scores, named
scores. The method returns the count of full mark scores, where scores are out of 10.
d. A method named countCharacter that accepts as parameter an array of characters named
list and a character named ch. The method returns the count of elements that have the
value of ch in the array list.
e. A method named maxOdd that accepts as parameter an array of positive integers named
a1. The method returns the value of the maximum odd number in the array a1. In case the
array contains no odd numbers the method should return -1.
f. A method named minPositive that accepts as parameter an array of doubles named list. The
method returns the index of the smallest positive number in the array list. If the array
contains no positive numbers the method should return -1.
g. A method named containNegative that accepts as parameter an array of integers named
list. The method returns true if the array list contains negative values, or it returns false,
otherwise.
h. A method named allLessThan30 that accepts as parameter an array of doubles named
scores. The method returns true if all the values saved in the array scores are less than or
equal to 30, or it returns false, otherwise.
i. A method named containLessThan that accepts as parameter an array of doubles named
scores and a single score s. The method returns true if the array scores have at least one
score which is less than the value of s, or it returns false, otherwise.
j. A method named containVowel that accepts as parameter an array of characters named
list. The method returns true if the array list contains at least one (lower case or upper case)
vowel, or it returns false, otherwise.
Where vowels are ‘a’, ‘e’, ‘i’, ‘o’ and ‘u’.