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));

    }

}