public static boolean isEmail(String str) {
// TODO Auto-generated method stub
String tegex="[a-zA-Z0-9_]+@\w+(\.com|\.cn){1}";
boolean flag=str.matches(tegex);
return flag;
}

public static boolean isEmail(String str) {
// TODO Auto-generated method stub
String tegex="[a-zA-Z0-9_]+@\w+(\.com|\.cn){1}";
boolean flag=str.matches(tegex);
return flag;
}