Java Taskbook Level 3.4

Задание 1

Given an array of numbers

javaint[] arr = [1, -2, -3, 4, -5, 6];

Count the number of negative numbers in this array.

Задание 2

Given some integer:

javaint num = 1357;

Check that all digits of this number are odd.

Задание 3

Given a number:

javaint 12345

Get an array of digits of this number:

javabyte[] {1, 2, 3, 4, 5}

Задание 4

Two arrays are given:

javaint[] arr1 = [1, 2, 3];
int[] arr2 = [4, 5, 6];

Combine these arrays into one:

javaint[] {1, 2, 3, 4, 5, 6}