com.tbs.devcorner.simple.App.java Source code

Introduction

Here is the source code for com.tbs.devcorner.simple.App.java

Source

package com.tbs.devcorner.simple;

/**
 * Simple example of a Java program used to query an API.
 * @license http://data.gc.ca/eng/open-government-licence-canada
 *
 * Maven Dependency:
 *   <dependency>
 *     <groupId>org.json</groupId>
 *     <artifactId>json</artifactId>
 *     <version>20131018</version>
 *   </dependency>
 */
import java.io.*;
import java.net.*;
import org.json.*;

public class App {
    public static void main(String[] args) {
        try {
            // Build Connection
            URL api_url = new URL("http://www.earthquakescanada.nrcan.gc.ca/api/earthquakes/");
            URLConnection api = api_url.openConnection();

            // Set HTTP Headers
            api.setRequestProperty("Accept", "application/json");
            api.setRequestProperty("Accept-Language", "en");

            // Get Response
            JSONTokener tokener = new JSONTokener(api.getInputStream());
            JSONObject jsondata = new JSONObject(tokener);

            // Display API name
            System.out.println(jsondata.getJSONObject("metadata").getJSONObject("request").getJSONObject("name")
                    .get("en").toString());

            // Iterate over latest links
            JSONObject latest = jsondata.getJSONObject("latest");
            for (Object item : latest.keySet()) {
                System.out.println(item.toString() + " -> " + latest.get(item.toString()));
            }

        } catch (MalformedURLException e) {
            System.out.println("Malformed URL");
        } catch (IOException e) {
            System.out.println("IO Error");
        }
    }
}