title: Import json URL to java and parse it using jackson library
body: <p>I am trying to read a json link in java and parse it so I can use it for other matters, but the problem is that I get errors that I really don't know waht to do about them.
  Here is the code:</p>
  
  <pre><code>package weather.data;
  
  import weather.data;
  
  import com.fasterxml.jackson.core.JsonParseException;
  //import com.fasterxml.jackson.annotation.JsonMappingException;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.JsonMappingException;
  
  import java.io.File;
  import java.net.URI;
  import java.io.IOException;
  
  public class usertest {
  
      public static void main() throws JsonParseException, JsonMappingException, IOException 
      {
  
          URI jsonUrl = new URI("https://gist.githubusercontent.com/anonymous/4b32c7ef1ceb5dd48bf5/raw/ef1987551faa3fb61473bb0e7aad70a228dc36d6/gistfile1.txt");
  
          ObjectMapper mapper = new ObjectMapper();
  
          City = mapper.readValue(jsonUrl, data.class);
      }
  
  }
  </code></pre>
  
  <p>Here are the errors:
  about import weather.data:Multiple markers at this line
      - Only a type can be imported. weather.data resolves to a 
       package
      - The import weather.data is never used</p>
  
  <p>about City = mapper.readValue(jsonUrl, data.class):Multiple markers at this line
      - data cannot be resolved to a type
      - City cannot be resolved to a variable
      - The method readValue(JsonParser, Class) in the type ObjectMapper is not applicable for the 
       arguments (URI, Class)
      - The method readValue(JsonParser, Class) in the type ObjectMapper is not applicable for the 
       arguments (URI, Class)
      - City cannot be resolved to a variable
      - data cannot be resolved to a type</p>
  
  <p>Any Ideas? Also I really do not understand the concept of using mapper.readValue. would any one help me please?</p>
  
  <p>Note: I have used json gen to generate the data objects inside the link and now I have object data java files: City, Coord, List1, Temp and Weather with the following contents.</p>
  
  <p>For City.java as a sample:</p>
  
  <pre><code>package weather.data;
  
  import java.util.List;
  
  public class City{
      private Coord coord;
      private String country;
      private Number id;
      private String name;
      private Number population;
  
      public Coord getCoord(){
          return this.coord;
      }
      public void setCoord(Coord coord){
          this.coord = coord;
      }
      public String getCountry(){
          return this.country;
      }
      public void setCountry(String country){
          this.country = country;
      }
      public Number getId(){
          return this.id;
      }
      public void setId(Number id){
          this.id = id;
      }
      public String getName(){
          return this.name;
      }
      public void setName(String name){
          this.name = name;
      }
      public Number getPopulation(){
          return this.population;
      }
      public void setPopulation(Number population){
          this.population = population;
      }
  }
  </code></pre>
  
  <p>Thanks in advance</p>