初识java--编程小点

 1 import java.util.Scanner;
 2 
 3 public class Chars_compare {
 4     public static void main(String[] args) {
 5 
 6         boolean is_con = false ;        
 7         System.out.println("提示，请输入一个字符串：");
 8         Scanner sc = new  Scanner (System.in);
 9         String toString = sc.next();　　//输入字符串
10         char [] any_char = toString.toCharArray(); // .toCharArray 方法：将字符串转为字符串数组
11         
12         for (int i = 0;i < any_char.length;i++){
13             if (any_char [i] == ‘A‘){
14                 is_con = true ;
15             }
16         }
17         
18         if (is_con){
19             System.out.println("该字符串中包含字母‘A’");
20         }else {
21             System.out.println("该字符串中无字母‘A’");
22         }
23         
24     }
25 }