package com.dao;

public class StringDemo {
//	String 类型自增
	 public static String changeString(String a) {
	        //截取字符串前两位字符
	        String b = a.substring(0,0);
	        //截取字符串后位字符
	        String c = a.substring(0,a.length());
	        //转换为数字类型
	        int d = Integer.parseInt(c);
	        //对字符增加1，并拼接字符。
	        String z = b+(d+1);
	        System.out.println(z);
	        return z;
	    }
	 public static void main(String[] args) {
		 StringDemo.changeString("99");
	}
}