📄 weather.java
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package com.heaton.bot.weather;
import com.heaton.bot.*;
import java.io.*;
/**
* Example from Chapter 11
*
* A simple weather aggregator. This bot will download the
* current temp from several different US cities. This
* aggregator can either return the list or write HTML
* to a file.
*/
public class Weather {
/**
* The city name
*/
public String city;
/**
* The temperature in degrees Fahrenheit.
*/
public double deg;
/**
* Called to get the current temperature.
*
* @param code A weather code for the city.
* @return The temperature in degrees fahrenheit.
*/
public static double getTemp(String code)
{
try {
String url;
url = "http://weather.noaa.gov/weather/current/";
url += code.toUpperCase();
url += ".html";
HTTPSocket http = new HTTPSocket();
http.send(url,null);
int i = http.getBody().indexOf("Temperature")+11;
while ( !Character.isDigit(http.getBody().charAt(i)) )
i++;
String str = http.getBody().substring(i,
http.getBody().indexOf(' ',i) );
return Double.parseDouble(str);
} catch ( Exception e ) {
}
return 0;
}
/**
* A list of cities to aggregate.
*/
static String _city[] = {
"Anchorage, AK|PANC",
"Atlanta, GA|KATL",
"Chicago, IL|KCGX",
"Denver, CO|KDEN",
"Honolulu, HI|PHNL",
"Los Angeles|KLAX",
"New Orleans, LA|KMSY",
"New York, NY|KNYC",
"Orlando, FL|KSFB",
"Phoenix, AZ|KPHX",
"St. Louis, MO|KSTL",
"Washington, DC|KDCA"};
public static Weather[] getList()
{
Weather array[] = new Weather[_city.length];
for ( int i=0;i<_city.length;i++ ) {
array[i] = new Weather();
array[i].city = _city[i].substring(0,
_city[i].indexOf("|") );
array[i].deg = getTemp(
_city[i].substring( _city[i].indexOf("|") + 1));
}
return array;
}
/**
* Aggregate this list of cities to a file.
*
* @param path Where to write the HTML file.
*/
public static void fileAggregate(String path)
{
try {
FileOutputStream fw = new FileOutputStream(path,true);
PrintStream ps = new PrintStream(fw);
ps.println("<html><head><title>Current Weather</title></head>");
ps.println("<body>");
ps.println("<h1>Current Weather</h1><table border=0>");
Weather wx[] = getList();
for ( int i=0;i<wx.length;i++ ) {
ps.println("<tr><td>" + wx[i].city + "</td><td>"
+ wx[i].deg + "</td></tr>");
}
ps.println("</table></body></html>");
ps.close();
fw.close();
} catch ( Exception e ) {
}
}
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