This document outlines the requirements for a Java program called 'Safety Alert System' which prompts users for input regarding city name, season, temperature, and rainfall, while ensuring input validation. The program checks for specific conditions based on the season and temperature to determine road safety and whether to call for help. If any input is invalid, the program provides appropriate error messages and prompts the user for correct input format before execution stops.

1. Use Java programming Thank you very much Programing requirement for: Safety Alert System
Version 01 I. Project and class name Create a new project name: yourfirst lastname program01
(you must include your name in the project name) Create a new class name: Safety Alert V0 1 II.
Requirement i. Input Prompt appropriate messages that asking use to enter: city name, season,
temperature, and raining. Input validation: your program has to valid the user input and prompt
specific message when user enter invalid input. Base on following validation: City name: only
can be string of letters, not containing number. Maximum length is 20 Season: only can be either
SUMMER or WINTER Temperature is in double Raining is in integer number if the program
found an invalid input, prompt a specific message that tell which input is invalid and what is the
correction format ofthat input should be, then STOP the program. That Page 2 of 4
Solution
import java.util.*;
class Safety_Alert_VO_1
{
private static double CONST_MIN_TEMP_WINTER = -20;
private static double CONST_MAX_TEMP_SUMMER = 127;
public static void main (String[] args)
{
Scanner scan = new Scanner(System.in);
boolean road_ice,call_for_help,flood,tminchange,tmaxchange;
road_ice = false;
call_for_help = false;
tminchange = false;
tmaxchange = false;
String stay_inside = "no";
System.out.println("Enter city name ");
String city = scan.next();
if ((city.contains("[a-zA-Z]+") == true) || (city.length() > 20))
{
System.out.println("Error: city name should be a string with not more than 20

2. characters");
System.exit(0);
}
System.out.println("Enter season : ");
String season = scan.next();
if(!(season.equals("WINTER") || season.equals("SUMMER")))
{
System.out.println("Error Season can be SUMMER or WINTER");
System.exit(0);
}
System.out.println("Enter temperature : ");
double temp = scan.nextDouble();
System.out.println("Enter raining : ");
int rain = scan.nextInt();
switch(season)
{
case "WINTER": if((temp < 32)&&(rain > 0))
road_ice = true;
if((temp < 5)||(rain>250))
stay_inside = "yes";
else
stay_inside = "no";
if((temp<-15)||(rain>500))
call_for_help = true;
if(temp350)
flood = true;
if((temp>120)||(rain>250))
stay_inside = "yes";
else
stay_inside = "no";
if((temp>125)||(rain>500))
call_for_help = true;
if(temp>CONST_MAX_TEMP_SUMMER)

3. {
CONST_MAX_TEMP_SUMMER =
Math.max(temp,CONST_MAX_TEMP_SUMMER);
tmaxchange = true;
}
}
System.out.println("CS103 Spring 2017");
System.out.println("Student : first and last name ");
System.out.println("Index Number : ");
System.out.println("The Cities Safety Alert System V01");
System.out.println("City Name : "+city);
System.out.println("Season : "+season);
System.out.println("Temperature : "+temp+ " Raining : "+rain);
System.out.println("Road icing : "+road_ice+" Stay inside : "+stay_inside);
if(tminchange == true)
System.out.println("This is the new minimum temperature record");
if(tmaxchange == true)
System.out.println("This is the new maximum temperature record");
if(call_for_help == true)
System.out.println("Call 911 now!!");
}
}
output: