正则表达式的简单应用实例

<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script> import java.io.*; import java.util.regex.*; public class Printer { public static void main(String[] args) { System.out.println(" Please enter the input string: "); BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String inputString; boolean isOK = false; try { while(!isOK) { if((inputString = reader.readLine()) != null) { if(inputString.length() > 200) { System.out.println("The string exceeds 200 characters. Please enter again! "); } else { Pattern regex = Pattern.compile("[^@#$%&*/^] "); Matcher matcher = regex.matcher(inputString); boolean isMatched = matcher.matches(); if(!isMatched) { System.out.println("The String cant contain @,#,$,%,*,& and ^. Please enter again! "); } else { isOK = true; System.out.println(" Your input string is: " inputString); } } } } } catch(IOException e) { e.printStackTrace(); } } }