Question

write a java program to chaeck whether the number entered by the user is a single digit number, a teo digit number or three digits number display the message accordingly​

Answer 1

Explanation:

statements for inputing number

if length of numbers is 1 or 2 or 3 accordingly you print the message

Answer 2

Answer:

import java.util.Date;

import java.util.HashMap;

import java.util.Map;

import java.util.UUID;

class AlertService {

private final MapAlertDAO storage = new MapAlertDAO();

public UUID raiseAlert() {

return this.storage.addAlert(new Date());

}

public Date getAlertTime(UUID id) {

return this.storage.getAlert(id);

}

}

class MapAlertDAO {

private final Map<UUID, Date> alerts = new HashMap<UUID, Date>();

public UUID addAlert(Date time) {

UUID id = UUID.randomUUID();

this.alerts.put(id, time);

return id;

}

public Date getAlert(UUID id) {

return this.alerts.get(id);

}

}