java 字符串中是否有数字

http://www.cnblogs.com/zhangj95/p/4198822.html

http://www.cnblogs.com/sunzn/archive/2013/07/12/3186518.html

参考：

 package cn.sunzn.demo;

 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 public class Demo {
     public static void main(String[] args) {
         System.out.println(isContainChinese("中国China"));
     }

     public static boolean isContainChinese(String str) {

         Pattern p = Pattern.compile("[\u4e00-\u9fa5]");
         Matcher m = p.matcher(str);
         if (m.find()) {
             return true;
         }
         return false;
     }
 }

在自己的例子里面，find起作用

 package sdf;

 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 public class d {

     public static boolean isNumeric(String str) {
         for (int i = str.length(); --i >= 0;) {
             if (!Character.isDigit(str.charAt(i))) {
                 return false;
             }
         }
         return true;
     }
     public static void main(String[] args) {
         // TODO Auto-generated method stub

         String s1="25";
         String s2="补考";
         Pattern pattern = Pattern.compile("\\d+");

           Matcher matcher1 = pattern.matcher(s1);
           //boolean b1= matcher1.matches();
           boolean b1= matcher1.find();
           System.out.println(b1);

           Matcher matcher2 = pattern.matcher(s2);
           //boolean b2= matcher2.matches();
           boolean b2= matcher2.find();
         System.out.println(b2);

         //System.out.println(isNumeric(s1));
        //System.out.println(isNumeric(s2));

     }

 }