I am trying to create an java/swing based application which shows weather. So far I have created background and textfield + button to get the location but I do not know how to connect it so it shows and changes the background to another image. I am sorry if that's a noob question, but I never did java before (just processing and arduino plus web design) and my uni forced me to use advanced java with knowledge I never did anything like that before.
Here is my code so far:
package AppPackage;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class ApplicationWidget extends JFrame implements ActionListener {
ImageIcon basic;
JLabel label1;
JFrame frame;
JLabel label;
JTextField textfield;
JButton button;
public static void main (String[]args){
ApplicationWidget gui = new ApplicationWidget();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setVisible(true);
gui.setSize(320, 480);
}
public ApplicationWidget() {
setLayout(new FlowLayout());
WeatherAPI weather = new WeatherAPI("44418");
System.out.println(WeatherAPI.theWeatherRSS);
for(int i = 0; i < WeatherAPI.weatherForecastList.size(); i++)
{
System.out.println(WeatherAPI.weatherForecastList.get(i).lowTemp + " " +
WeatherAPI.weatherForecastList.get(i).highTemp);
}
label = new JLabel("Welcome! Please Enter your location");
add(label);
textfield = new JTextField(15);
add(textfield);
for(int i = 0; i < WeatherAPI.weatherForecastList.size(); i++)
{
System.out.println(WeatherAPI.weatherForecastList.get(i).lowTemp + " " +
WeatherAPI.weatherForecastList.get(i).highTemp);
}
button = new JButton("Check weather");
add(button);
basic = new ImageIcon(getClass().getResource("basicback.jpg"));
label1 = new JLabel(basic);
add(label1);
/*add design here*/
/*add mouse interaction*/
/*add image capture*/
}
@Override
public void actionPerformed(ActionEvent e){
JButton button = (JButton) e.getSource();
if (e.getSource() == button){
String data = textfield.getText();
System.out.println(data);
}
}
}
And the WeatherAPI code:
package AppPackage;
import java.net.*;
import java.util.regex.*;
import java.util.ArrayList;
import java.io.*;
public class WeatherAPI
{
static String theWeatherRSS;
static String theCity;
static ArrayList<Forecast> weatherForecastList;
//WeatherAPI(String string) {
// throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
// }
public class Forecast
{
String lowTemp;
String highTemp;
}
/**
*
* @param city
*/
public WeatherAPI(String city)
{
theCity = city;
theWeatherRSS = getWeatherAsRSS(city);
parseWeather(theWeatherRSS);
}
void parseWeather(String weatherHTML)
{
weatherForecastList = new ArrayList<Forecast>();
int startIndex = 0;
while(startIndex != -1)
{
startIndex = weatherHTML.indexOf("<yweather:forecast", startIndex);
if(startIndex != -1)
{ // found a weather forecast
int endIndex = weatherHTML.indexOf(">", startIndex);
String weatherForecast = weatherHTML.substring(startIndex, endIndex+1);
// get temp forecast
String lowString = getValueForKey(weatherForecast, "low");
String highString = getValueForKey(weatherForecast, "high");
Forecast fore = new Forecast();
fore.lowTemp = lowString;
fore.highTemp = highString;
weatherForecastList.add(fore);
// move to end of this forecast
startIndex = endIndex;
}
}
}
String getValueForKey(String theString, String keyString)
{
int startIndex = theString.indexOf(keyString);
startIndex = theString.indexOf("\"", startIndex);
int endIndex = theString.indexOf("\"", startIndex+1);
String resultString = theString.substring(startIndex+1, endIndex);
return resultString;
}
String getWeatherAsRSS(String city)
{
try{
/*
Adapted from: http://stackoverflow.com/questions/1381617/simplest-way-to-correctly-load-html-from-web-page-into-a-string-in-java
Answer provided by: erickson
*/
URL url = new URL("http://weather.yahooapis.com/forecastrss?w="+city+"&u=c");
URLConnection con = url.openConnection();
Pattern p = Pattern.compile("text/html;\\s+charset=([^\\s]+)\\s*");
Matcher m = p.matcher(con.getContentType());
/* If Content-Type doesn't match this pre-conception, choose default and
* hope for the best. */
String charset = m.matches() ? m.group(1) : "ISO-8859-1";
Reader r = new InputStreamReader(con.getInputStream(), charset);
StringBuilder buf = new StringBuilder();
while (true) {
int ch = r.read();
if (ch < 0)
break;
buf.append((char) ch);
}
String str = buf.toString();
return(str);
}
catch(Exception e) {System.err.println("Weather API Exception: "+e);}
return null;
}
}
Thanks for any help, I am truly desperate because I have mixed up the dates of submission and I have not much time left....
