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package com.joe;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test
{
    //½«×Ö·û´®µÄÊý×Ö×Ö·ûÊä³ö
    public static void main(String[] args)
    {
        String str = "iu7i8hy4jnb2";
       
        //·½·¨Ò»
        String vString = str.replaceAll("[\\D]", "");    // [\D] == [^\d] == [^0-9]
        System.out.println(vString);
       
        //·½·¨¶þ
        String regex = "\\d";
        Matcher m = Pattern.compile(regex).matcher(str);
        while(m.find())
        {
            System.out.print(m.group());
        }
        System.out.println();
    }
}


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