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Figure 3
Tom
21 Figure 4
Code02.java:40: error: incompatible types: String cannot be converted to Long
Long temp04 = (String)(temp03.get("Age"));^
Note: Code02.java uses unchecked or unsafe operations.Note: Recompile with -Xlint:unchecked for details.
1 errorError: Could not find or load main class Code02 Figure 5
Tom
21true Figure 6
Code03.java:44: error: incompatible types: String cannot be converted to Boolean
Boolean temp06 = (String)(temp05.get("Student"));^
Note: Code03.java uses unchecked or unsafe operations.Note: Recompile with -Xlint:unchecked for details.
1 errorError: Could not find or load main class Code03 Figure 7
Tom
21true This section contains Listings that may be referred to by one or more questions or answers.
Listing 1
/************************************************
Copyright: R.G.Baldwin 2016Tested with Java 8, Windows 7, and
json-simple-1.1.1.********************************************************************/
import org.json.simple.JSONObject;import org.json.simple.JSONArray;
import org.json.simple.JSONValue;class Code01{
public static void main(String[]args){
JSONObject jsonObj01 = new JSONObject();jsonObj01.put("Name","Tom");
JSONObject jsonObj02 = new JSONObject();jsonObj02.put("Age",21);
JSONObject jsonObj03 = new JSONObject();jsonObj03.put("Student",true);JSONArray array01 = new JSONArray();array01.add(jsonObj01);
array01.add(jsonObj02);array01.add(jsonObj03);JSONObject jsonObj04 = new JSONObject();
jsonObj04.put("person",array01);String jsonString = jsonObj04.toJSONString();
JSONObject jsonObj05 = (JSONObject)(JSONValue.parse(jsonString));JSONArray array02 = (JSONArray)(jsonObj05.get("person"));JSONObject temp01 = (JSONObject)(array02.get(0));
String temp02 = temp01.get("Name");System.out.println(temp02);}//end main
}//end class Code01 Listing 2
/************************************************
Copyright: R.G.Baldwin 2016Tested with Java 8, Windows 7, and
json-simple-1.1.1.********************************************************************/
import org.json.simple.JSONObject;import org.json.simple.JSONArray;
import org.json.simple.JSONValue;class Code02{
public static void main(String[]args){
JSONObject jsonObj01 = new JSONObject();jsonObj01.put("Name","Tom");
JSONObject jsonObj02 = new JSONObject();jsonObj02.put("Age",21);
JSONObject jsonObj03 = new JSONObject();jsonObj03.put("Student",true);JSONArray array01 = new JSONArray();
array01.add(jsonObj01);array01.add(jsonObj02);
array01.add(jsonObj03);JSONObject jsonObj04 = new JSONObject();jsonObj04.put("person",array01);String jsonString = jsonObj04.toJSONString();
JSONObject jsonObj05 = (JSONObject)(JSONValue.parse(jsonString));JSONArray array02 = (JSONArray)(jsonObj05.get("person"));JSONObject temp01 = (JSONObject)(array02.get(0));
String temp02 = (String)(temp01.get("Name"));System.out.println(temp02);JSONObject temp03 = (JSONObject)(array02.get(1));
Long temp04 = (String)(temp03.get("Age"));System.out.println(temp04);}//end main
}//end class Code02 Listing 3
/************************************************
Copyright: R.G.Baldwin 2016Tested with Java 8, Windows 7, and
json-simple-1.1.1.********************************************************************/
import org.json.simple.JSONObject;import org.json.simple.JSONArray;
import org.json.simple.JSONValue;class Code03{
public static void main(String[]args){
JSONObject jsonObj01 = new JSONObject();jsonObj01.put("Name","Tom");
JSONObject jsonObj02 = new JSONObject();jsonObj02.put("Age",21);
JSONObject jsonObj03 = new JSONObject();jsonObj03.put("Student",true);JSONArray array01 = new JSONArray();
array01.add(jsonObj01);array01.add(jsonObj02);
array01.add(jsonObj03);JSONObject jsonObj04 = new JSONObject();jsonObj04.put("person",array01);String jsonString = jsonObj04.toJSONString();
JSONObject jsonObj05 = (JSONObject)(JSONValue.parse(jsonString));JSONArray array02 = (JSONArray)(jsonObj05.get("person"));JSONObject temp01 = (JSONObject)(array02.get(0));
String temp02 = (String)(temp01.get("Name"));System.out.println(temp02);JSONObject temp03 = (JSONObject)(array02.get(1));
Long temp04 = (Long)(temp03.get("Age"));System.out.println(temp04);JSONObject temp05 = (JSONObject)(array02.get(2));
Boolean temp06 = (String)(temp05.get("Student"));System.out.println(temp06);}//end main
}//end class Code03 Listing 4
/************************************************
Copyright: R.G.Baldwin 2016Tested with Java 8, Windows 7, and
json-simple-1.1.1.********************************************************************/
import org.json.simple.JSONObject;import org.json.simple.JSONArray;
import org.json.simple.JSONValue;class Code04{
public static void main(String[]args){
JSONObject jsonObj01 = new JSONObject();jsonObj01.put("Name","Tom");
JSONObject jsonObj02 = new JSONObject();jsonObj02.put("Age",21);
JSONObject jsonObj03 = new JSONObject();jsonObj03.put("Student",true);JSONArray array01 = new JSONArray();
array01.add(jsonObj01);array01.add(jsonObj02);
array01.add(jsonObj03);JSONObject jsonObj04 = new JSONObject();jsonObj04.put("person",array01);String jsonString = jsonObj04.toJSONString();
JSONObject jsonObj05 = (JSONObject)(JSONValue.parse(jsonString));JSONArray array02 = (JSONArray)(jsonObj05.get("person"));JSONObject temp01 = (JSONObject)(array02.get(0));
String temp02 = (String)(temp01.get("Name"));System.out.println(temp02);JSONObject temp03 = (JSONObject)(array02.get(1));
Long temp04 = (Long)(temp03.get("Age"));System.out.println(temp04);JSONObject temp05 = (JSONObject)(array02.get(2));
Boolean temp06 = (Boolean)(temp05.get("Student"));System.out.println(temp06);}//end main
}//end class Code04 This section contains a variety of miscellaneous information.
Financial : Although the Connexions site makes it possible for you to download aPDF file for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, youshould be aware that some of the HTML elements in this module may not translate well into PDF.
I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version ofthe module.
In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale onAmazon.com showing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If youpurchase such a book, please be aware that it is a copy of a module that is freely available on cnx.org and that it was made andpublished without my prior knowledge.
Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.
-end-
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