1) Write a java program to get JSON data from URL http://echo.jsontest.com/Operand1/10/Operand2/5/Operator/+
2) Perform Mathematical operation in Java after reading JSON from above URL and print result.
example for above URL
Result = 10+5 = 15
3) The result should be dynamic and should change if we change values in above URLs
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Scanner;
import org.json.JSONException;
import org.json.JSONObject;
public class JsonReader {
private static String readAll(Reader rd) throws IOException {
StringBuilder sb = new StringBuilder();
int cp;
while ((cp = rd.read()) != -1) {
sb.append((char) cp);
}
return sb.toString();
}
public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
InputStream is = new URL(url).openStream();
try {
BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
String jsonText = readAll(rd);
JSONObject json = new JSONObject(jsonText);
return json;
} finally {
is.close();
}
}
public static void main(String[] args) throws IOException, JSONException {
Scanner in = new Scanner(System.in);
System.out.println("Enter the JSON URL :");
String url = in.next();
JSONObject json = readJsonFromUrl(url);
int op1= Integer.parseInt((String)json.get("Operand1"));
int op2= Integer.parseInt((String)json.get("Operand2"));
int result = op1+op2;
System.out.println("Result is : "+ result);
}
}
