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Void elements in HTML

There are six categories of HTML elements. Void element is one among the six categories that have the following HTML elements. Void elements or tags do not need the closing tag and always be closed in the same opening tag, that's why we also refer to these elements as self-closing elements. Void elements can't have child elements or content.

  1. area
  2. base
  3. br
  4. col
  5. embed
  6. hr
  7. img
  8. input
  9. link
  10. meta
  11. param
  12. source
  13. track
  14. wbr
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How to iterate on a JSON objects using Java

Today we are going to see how to iterate on a JSON object or read a JSON file and fetch key and value from that JSON file using Java.

 Below is the example code snippet.



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package rashidjorvee;

import java.io.FileReader;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
public class JsonReader {
 /* JSON data file
  * [
    {
      "componentName": "comp1""compKey": [
        {
          "keyname": "json_key1",
          "props": [
            {
              "fieldLabel": "Jorvee",
              "name": "./productProperty",
              "id": "productID",
              "sling:resourceType": "granite/ui/components/foundation/form/textfield"
            }
          ]
        }
      ]
    },
    {
      "componentName": "comp2""compKey": [
        {
          "keyname": "json_key2",
          "props": [
            {
              "fieldLabel": "Rashid",
              "name": "./productProperty",
              "id": "productID",
              "sling:resourceType": "foundation/components/parsys"
            }
          ]
        }
      ]
    }
  ]
  */
 public static void main(String[] args) {
  try{
   JSONParser parser=new JSONParser();
   JSONArray a = (JSONArray) parser.parse(new FileReader("D:\\json/jsonFile.json"));
   for (Object comp:a) {
    JSONObject key1 = (JSONObject) comp;
    String componentName = (String) key1.get("componentName");
    System.out.println("componentName: "+componentName);
    JSONArray compkeys = (JSONArray) key1.get("compKey");
    for (Object o : compkeys)
    {
     JSONObject key = (JSONObject) o;
     String keyName = (String) key.get("keyname");
     System.out.println("KeyName: "+keyName);
     
     JSONArray keys = (JSONArray) key.get("props");
     for (Object prop : keys) {
      JSONObject properties = (JSONObject) prop;
      
      String name = (String) properties.get("name");
      System.out.println("Name: " +name);
      
      String fieldLabel = (String) properties.get("fieldLabel");
      System.out.println("City: "+fieldLabel);
      
      String job = (String) properties.get("sling:resourceType");
      System.out.println("resourceType: "+job);
      
      String id = (String) properties.get("id");
      System.out.println("ID: "+id);
      
     }
     System.out.println("\n");
    }
   }
  } catch(Exception e) {}

 }

}
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