【字符串】统计一行字符串中有多少单词？

 1 import java.util.Scanner;
 2 
 3 public class Main {
 4 
 5     public static void main(String[] args) {
 6 
 7         Scanner scanner = new Scanner(System.in);
 8 
 9         while (scanner.hasNextLine()) {
10 
11             String input = scanner.nextLine();
12             int result = Main.count(input);
13             System.out.println("count:" + result);
14         }
15     }
16 
17     public static int count(String str) {
18 
19         int num = 0;
20         int flag = 0;
21         char[] array = str.toCharArray();
22 
23         for (int i = 0; i < array.length; i++) {
24             if (array[i] == ‘ ‘ && flag == 0) {
25                 num++;
26                 flag = 1;
27             } else if (array[i] != ‘ ‘) {
28                 flag = 0;
29             }
30         }
31 
32         if (‘ ‘ == array[array.length - 1]) {
33             return num;
34         } else {
35             return num + 1;
36         }
37     }
38 }