package email;
import java.util.Scanner;
public class Email {
	public static void main(String[] args) {
		String email;
		Scanner in=new Scanner(System.in);
		System.out.println("请输入Email地址：");
		email=in.nextLine();
		if(email.indexOf("@")==-1||email.indexOf(".")==-1){
			System.out.println("输入Email地址无效，地址必须同时含有“@”和“.”！");
		}
		else{
			if(email.indexOf("@")>email.indexOf(".")){
				System.out.println("输入Email地址无效，地址中“@”必须在“.”之前！");
			}
			else{
				if(email.startsWith("@")){
					System.out.println("输入Email地址无效，地址中不能以“@”开头！");
				}
				else{
					if(!email.endsWith("com")&&!email.endsWith("cn")&&!email.endsWith("net")&&!email.endsWith("gov")&&!email.endsWith("edu")&&!email.endsWith("org")){
						System.out.println("输入Email地址无效，地址必须以com|cn|net|gov|edu|org结尾！");
					}
					else{
						System.out.println("输入的Email地址有效！");
					}
				}
			}
		}
	}
}