public class test{ public static void main(String[] args){ try{ String s = ""; while(!s.equals("q")){ System.out.PRint("input:"); DataInputStream in = new DataInputStream(new BufferedInputStream(System.in)); s = in.readLine(); System.out.println("your input is :"+s); String check = "^([a-z0-9A-Z]+[-//.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?//.)+[a-zA-Z]{2,}$"; Pattern regex = Pattern.compile(check); Matcher matcher = regex.matcher(s); boolean isMatched = matcher.matches(); if(isMatched){ System.out.println("it's a email"); }else{ System.out.println("it's not a email"); }
