java正则表达式判断邮件地址是否合法，java正则表达式,import java.

java正则表达式判断邮件地址是否合法，java正则表达式,import java.

import java.util.regex.Matcher;import java.util.regex.Pattern;import java.util.Scanner;public class Email{    public static void main(String []args){        Scanner scan = new Scanner(System.in);        String str=null;        str = scan.next();        String pat="[a-zA-Z0-9_\\-\\.]+@[a-zA-Z0-9]+(\\.(com))";        Pattern p = Pattern.compile(pat);//实例化Pattern类        Matcher m = p.matcher(str);//验证内容是否合法        if(m.matches())          System.out.println("YES");        else          System.out.println("NO");    }}