how to read json file

[jk91]

to nswer first question of this problem tried below:-

Create a class named "JSONRead" in eclipse. In this we will using "JSONParser" to convert the JSON string in the file to JSONOBject.
 In order to use JSON Parser makes sure that your string is in JSON format.


package logicProgramming;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Iterator;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

public class JsonRead {

	public static void main(String[] args) {
		
		JSONParser parser = new JSONParser();
		//JsonParser to convert JSON string into Json Object

		try {
			Object obj = parser.parse(new FileReader("g:\\newfile.json"));
			//parsing the JSON string inside the file that we created earlier.

			JSONObject jsonObject = (JSONObject) obj;
			System.out.println(jsonObject);
			//Json string has been converted into JSONObject

			String name = (String) jsonObject.get("name");
			System.out.println(name);

			String department = (String) jsonObject.get("department");
			System.out.println(department);

			String branch = (String) jsonObject.get("branch");
			System.out.println(branch);

			long year = (long) jsonObject.get("year");
			System.out.println(year);
			//Displaying values from JSON OBject by using Keys

			JSONArray remarks = (JSONArray) jsonObject.get("remarks");
			//converting the JSONObject into JSONArray as remark was an array.
			Iterator<String> iterator = remarks.iterator();
			//Iterator is used to access the each element in the list 
			//loop will continue as long as there are elements in the array.
			while (iterator.hasNext()) {
				System.out.println(iterator.next());
				//accessing each elemnt by using next function.
			}

		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		}
	}

}