please help me and tell me each step of this program on detail.

please explain each step one by one!

4. Write a Java method to count all words in a string. Expected Output: Input the string: The quick brown fox jumps over the lazy dog. Number of words in the string: 9 import java.util.Scanner; public class Tutorial5_04 { public static void main(String args) { Scanner in = new Scanner(System.in); System.out.print("Input the string: "); String str = in.nextLine(); System.out.print("Number of words in the string:" + count_Words(str)+" "); public static int count_Words(String str) { int count = 0; if (!("'.equals(str.substring(0, 1))) || !" ".equals(str.substring(str.length() - 1)))) { for (int i = 0; i