class Mail {
// Method to accept and print mail ID
public void printMail(String mail) {
    System.out.println("Mail ID: " + mail);
}

// Overloaded method to accept and print mail ID
public void printMail(int mail) {
    System.out.println("Mail ID: " + mail);
}

}

public class Main {
public static void main(String[] args) {
    Mail mail = new Mail();
    
    // Accepting mail ID as string input
    System.out.println("Enter mail ID: ");
    Scanner sc = new Scanner(System.in);
    String mailId = sc.nextLine();
    mail.printMail(mailId);
    
    // Accepting mail ID as integer input
    System.out.println("Enter mail ID: ");
    int mailIdInt = sc.nextInt();
    mail.printMail(mailIdInt);
}

}
在此示例中，printMail方法被重载以接受字符串和整数作为输入。main方法提示用户输入其邮件ID，然后根据输入类型调用相应版本的printMail方法。然后，邮件ID被输出到控制台。请注意，此示例使用Scanner对象在运行时读取用户的输入。