package com.whl;public class Seachnumber { public static void main(String[] args) { /* String str="dsfggf34fg56fg3rg6fhg74dgd"; String a=str.replaceAll("[^0-9]", " ");//这是用正则表达式,把数据用空格代替 System.out.println(a);*/ String str="sdfer3rf45t4dt45dgt45gdfg"; char[] ch=str.toCharArray();//把字符串转化为字符数组 for(int i=0;i<ch.length;i++){ if(Character.isDigit(ch[i])){//方法Character.isDigit(ch[i])判断字符是否是数字 System.out.print(ch[i]); } } }}
转载请注明原文地址: https://ibbs.8miu.com/read-18434.html