weatherApp.java

package liveWeather;

import java.net.*;
import java.io.*;
import java.util.*;
import java.util.Map.*;
import java.util.regex.*;

public class weatherApp
{
	public static void showWeather(String location){
		String key="1516fe41c920442babd110027200105&q="+location;
		String url="http://api.weatherapi.com/v1/current.json?key="+key;
		
		try{
			URL uh=new URL(url);
			BufferedReader bf=new BufferedReader(new InputStreamReader(uh.openStream()));
			String json;
			json=bf.readLine();
			
			String data[]=json.split(",");
			Map<String,String> map=new HashMap<String,String>();
			for(int i=1;i<data.length;i++){
				if(Pattern.compile(".region*").matcher(data[i]).find()){
				data[i]=data[i].substring(data[i].indexOf(":")+1,data[i].length());
					map.put("Region",data[i]);
				}
				else if(Pattern.compile(".country*").matcher(data[i]).find()){
			   data[i]=data[i].substring(data[i].lastIndexOf(":")+1,data[i].length());
					map.put("Country",data[i]);
				}
				else if(Pattern.compile(".localtime[^a-z]*").matcher(data[i]).find()){
					data[i]=data[i].substring(data[i].indexOf(":")+1,data[i].length()-1);
					map.put("Localtime",data[i]);
				}
				else if(Pattern.compile(".temp_c.").matcher(data[i]).find()){
				data[i]=data[i].substring(data[i].lastIndexOf(":")+1,data[i].length());
					map.put("Temperature(Celcius)",data[i]);
				}
				else if(Pattern.compile(".*temp_f*").matcher(data[i]).find()){
				data[i]=data[i].substring(data[i].lastIndexOf(":")+1,data[i].length());
					map.put("Temperature (Fahrenheit)",data[i]);
				}
				else if(Pattern.compile(".is_day*").matcher(data[i]).find()){
					if(data[i].charAt(data[i].length()-1) == '1')
						map.put("Day/Night","Day");
					else
						map.put("Day/Night","Night");
				}
				else if(Pattern.compile(".*text*").matcher(data[i]).find()){
					data[i]=data[i].substring(data[i].lastIndexOf(':')+1,data[i].length());
					map.put("Condition",data[i]);
				}
				else{
						continue;
				}
			}
			for(Entry<String,String> e:map.entrySet()){
				System.out.println(e.getKey()+" : "+e.getValue()+"\n");
			}
			
		}
		catch(Exception e){
			e.printStackTrace();
		}
		
	}
	public static void main(String[] args) throws Exception {
		System.out.print("Enter a city name : ");
		@SuppressWarnings("resource")
		Scanner kb = new Scanner(System.in);
		
		String location=kb.nextLine();
		System.out.println("\n\n\t\t\t\t=======================");
		System.out.println("\t\t\t\t|| Live Weather Info ||");
		System.out.println("\t\t\t\t=======================\n\n");
		System.out.println("Given location : "+location+"\n\n");
		showWeather(location);
	}
}