Example of implementation method for converting java objects and json objects

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public class MainClass {
  public static void main(String[] args) {
    TestJsonBean();
    TestJsonAttribute();
    TestJsonArray();
  }
  @SuppressWarnings("rawtypes")
  private static void TestJsonArray() {
    Student student1 = new Student();
    (1);
    ("jag");
    ("man");
    (25);
    (new String[]{"basketball","game"});
    Student student2 = new Student();
    (2);
    ("tom");
    ("woman");
    (23);
    (new String[]{"On the Internet","running"});
    List<Student> list = new ArrayList<Student>();
    (student1);
    (student2);
    JSONArray jsonArray = (list);
    (());
    JSONArray new_jsonArray=(());
    Collection java_collection=(new_jsonArray);
    if(java_collection!=null && !java_collection.isEmpty())
    {
      Iterator it=java_collection.iterator();
      while(())
      {
        JSONObject jsonObj=(());
        Student stu=(Student) (jsonObj,);
        (());
      }
    }
  }
  private static void TestJsonAttribute() {
    /**
      * Create a json object and set properties for the object
      */
    JSONObject jsonObj = new JSONObject();
    ("Int_att",25);//Add int-type attribute    ("String_att","str");//Add string attribute    ("Double_att",12.25);//Add double attribute    ("Boolean_att",true);//Add boolean attribute    //Add JSONObject type attribute    JSONObject jsonObjSon = new JSONObject();
    ("id", 1);
    ("name", "tom");
    ("JSONObject_att",jsonObjSon);
    //Add JSONArray type attribute    JSONArray jsonArray = new JSONArray();
    ("array0");
    ("array1");
    ("array2");
    ("array3");
    ("JSONArray_att", jsonArray);
    (());
    ("Int_att:"+("Int_att"));
    ("String_att:"+("String_att"));
    ("Double_att:"+("Double_att"));
    ("Boolean_att:"+("Boolean_att"));
    ("JSONObject_att:"+("JSONObject_att"));
    ("JSONArray_att:"+("JSONArray_att"));
  }
  /**
    * Java objects and json objects convert each other
    */
  private static void TestJsonBean() {
    /**
      * Create java object
      */
    Student student = new Student();
    (1);
    ("jag");
    ("man");
    (25);
    (new String[]{"basketball","On the Internet","running","game"});
    /**
      * Convert java object into json object and get json object properties
      */
    JSONObject jsonStu = (student);
    (());
    (("hobby"));
    /**
      * Convert json object into java object and get java object properties
      */
    Student stu = (Student) (jsonStu, );
    (());
    /**
      * Create a json object
      */
    JSONObject jsonObj = new JSONObject();
    ("id",1);
    ("name","Zhang Yong");
    ("sex","male");
    ("age",24);
    //("hobby",new String[]{"online","game","running","music"});    //(());
    /**
      * Convert json object to java object
      */
    Student stud = (Student) (jsonObj,);
    (());
  }
}