java 字符串含有字母 java字符串包含字符个数

import java.util.Scanner; 

 public class Counter { 

     static Scanner scanner = new Scanner(System.in); 

     public static void count(String s) { 

         int low, upper, num, others; 

         low = upper = num = others = 0; 

         for (int i = 0; i < s.length(); i++) { 

             if (Character.isDigit(s.charAt(i))) { 

                 num++; 

                 continue; 

             if (Character.isLowerCase(s.charAt(i))) { 

                 low++; 

                 continue; 

             if (Character.isUpperCase(s.charAt(i))) { 

                 upper++; 

                 continue; 

             } else { 

                 others++; 

         System.out.println(" 大写字母的个数为：" + upper + "\n 小写字母的个数为：" + low+ "\n 数字的个数为： " + num + "\n 其他字符的个数为： " + others); 

     public static void subCounter(String str1, String str2) { 

         int counter = 0; 

         for (int i = 0; i <= str1.length() - str2.length(); i++) { 

             if (str1.substring(i, i + str2.length()).equalsIgnoreCase(str2)) { 

                 counter++;http://www.huiyi8.com/chajian/ 
  
 
jquery插件 

         System.out.println("子字符串的个数为： " + counter); 

     public static void main(String[] args) { 

         // TODO Auto-generated method stub 

         System.out.println("请输入一个字符串:"); 

         String string = scanner.nextLine(); 

         System.out.println("-----------------------------"); 

         // 查询在这个字符串中存在多少个子字符串str。 

         System.out.println("请输入一个您想查询的子字符串:"); 

         String str = scanner.nextLine(); 

         subCounter(string, str);