/* package whatever; // don't place package name! */
 
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.println("Result is " + isGmail("stackoverflow@gmail.com"));
	}
 
	public final static boolean isGmail(String s) {
 
		Pattern pattern = Pattern.compile("(\\W|^)[\\w.+\\-]*@gmail.com(\\W|$)");
		System.out.println(pattern + "            pp  ");
		Matcher m = pattern.matcher(s);
		System.out.println(m + "            pp  ");
		boolean b = m.matches();
		System.out.println(b + "            pp  ");
		return b;
	}	
}

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