package com.leo.test;
  

  

  import java.util.regex.Matcher;
  

  import java.util.regex.Pattern;
  

  

  public class Test12 {
  

  public static void main( String [] args ) {
  

  String str = "iu7i8hy4jnb2";
  

  Pattern p = Pattern.compile( "\\d" );
  

  Matcher matcher = p.matcher( str );
  

  while ( matcher.find() ) {
  

  System.out.print(matcher.group());
  

  }
  

  }
  

  }