LeetCode_434. Number of Segments in a String

434. Number of Segments in a String

Easy

Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non-space characters.

Please note that the string does not contain any non-printable characters.

Example:

Input: "Hello, my name is John"
Output: 5

package leetcode.easy;

public class NumberOfSegmentsInAString {
	public int countSegments1(String s) {
		String trimmed = s.trim();
		if (trimmed.equals("")) {
			return 0;
		}
		return trimmed.split("\\s+").length;
	}

	public int countSegments2(String s) {
		int segmentCount = 0;

		for (int i = 0; i < s.length(); i++) {
			if ((i == 0 || s.charAt(i - 1) == ' ') && s.charAt(i) != ' ') {
				segmentCount++;
			}
		}

		return segmentCount;
	}

	@org.junit.Test
	public void test() {
		System.out.println(countSegments1("Hello, my name is John"));
		System.out.println(countSegments2("Hello, my name is John"));
	}
}