7 判断输入字符个数

• 题目：输入一行字符，分别统计出其中英文字母、空格、数字和其它字符的个数。

      public class _007CountStringAll {
  
      public static void main(String[] args) {
          printCount();
      }
  
      private static void printCount() {
          while (true) {
              Scanner scanner = new Scanner(System.in);
             System.out.println("请输入一组字符 : ");
             String string = scanner.nextLine();
             char[] ch = string.toCharArray();
             count(ch);
         }
     }
 
     private static void count(char[] ch) {
         int adbCount = 0;
         int spaceCount = 0;
         int numCount = 0;
         int otherCount = 0;
 
         for (int i = 0; i < ch.length; i++) {
             // 判断是否是字母
             if (Character.isLetter(ch[i])) {
                 adbCount++;
             } //判断是否是数字
             else if (Character.isDigit(ch[i])) {
                 numCount++;
             } else if (Character.isSpaceChar(ch[i])) {
                   spaceCount++;
             } else {
                 otherCount++;
             }
         }
         System.out.println("字母个数是:" + adbCount);
         System.out.println("数字个数是:" + spaceCount);
         System.out.println("空格个数是:" + numCount);
         System.out.println("其他字符个数是:" + otherCount);
    }
 }