Exe5.java

package in.ajduke.ap013;
 
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.annotations.SerializedName;
 
public class GsonEx {
  public static void main(String[] args) throws IOException {
  
  Gson gson = new Gson();
  System.out.println("Writing JSON to file ....");
  // using try with resources
  try (FileWriter writer = new FileWriter("d:/output.json")) { 
    gson.toJson(new Developer(), writer); // writing to file
  }
  
  System.out.println("Reading from file.. ");
  FileReader fileReader = new FileReader("d:/output.json");
  dev= gson.fromJson(fileReader, Developer.class);
  System.out.println(dev);
  }
}


class Developer {
  private String name;
  private String classz;
  List<String> languagesKnown;
  
  public Developer() {
    name = "ajduke";
    languagesKnown = new ArrayList<>();
    languagesKnown.add("Java");
    languagesKnown.add("Scala");
    languagesKnown.add("Ruby");
  }
  
  @Override
  public String toString() {
    return "Developer [name=" + name + ", classz=" + classz
      + ", languagesKnown=" + languagesKnown + "]";
  }
}