inheritance - Which would be the best design pattern in Java for this problem? -


I have a class CommonTableModel which has several example methods and works on every two example variables

  • Data
  • Data

    Now, I have six tables, each is different in the name of the column, all the normal The methods should be with the CommonTableModel class. Therefore, to give an example of CommonTableModel for a JTable example, I must first start both the frequency variable (column name and data).

    Q1. Do I want to make six tablesmodel, be consistent with each table, and then spread them to normaltablesmodel? 

      Public class FirstTemplatesModel generallyModel {Public FirstTableModel () {columnNames = {"id", "name"}; Data = {{1, "John"}}; }}

    In the above example, I tried to introduce inherited data members so that six tablemodels could populate each column names according to the table they show.

    But I got an error which is prohibiting me from initiating the members who are coming in this way. I think we can not initialize the example variable in this way.

    Then how can I populate the instance variable of the CommonTelLodal so that I can populate those data later in the normal table modeling procedure.

    One of the solutions is to pass data to the constructor of CommonTableModel, but in this way, when I create a table, I have to fill in each column name.

    I am very confused because I do not have much experience in programming and do not know good coding practices.

    Please also mention some good design pattern books so that I get a better understanding of design patterns.

    • But I got an error that would allow me to initiate the inherited members To this side is banned. I think we can not initialize the example variable in this way.

    The ARARs that are not started with new are array constants . After the announcement, you can start them only directly e.g. 

      string [] strings = {"foo", "bar"}; In this way, you should replace special rows (assuming they are already the  protected  fields of  CommonTableModel ): 
     
      columnNames = new string [] {"id", "name"}; Data = new object [] [] {{1, "John"}}; According to the comments,  
     
      edit : You can definitely define a constructor for it and call  super  Can be used . The advantage of this is that it improves the degree of encapsulation, i.e. you do not need to declare the  protected  field, but now they can be declared as  private  here The kickoff example is: 
     
      public intangible class CommonTableModel {personal string} [columnNames; Private object [] [] data; Protected CommonTableModel (string [] columnname, object [] [] data) {this.columnNames = columnNames; This.data = data; The public class extends to the FirstTableModel Moderate Model (public FirstTableModel ()) {super (new string) ["id", "name"}, new object [] [] {{1, "John"}}); }}  
     
     Note that you still need the  new  keyword to give them a code (rsp was wrong in its reply). You should only make  No  properties  stable ! This will affect  every instance  of the same category. You do not really want to do this here also see my comment below.

    Comments

    Post a Comment

    Popular posts from this blog

    sql - dynamically varied number of conditions in the 'where' statement using LINQ -

    I am using my first project LINQ (in mvc), so maybe there's something very simple that I remember. However, a day of searching and experimenting does not work, so it works. I am trying to write a LINQ query (Linux to SQL) in which in many cases where the statement is different from an OR or an AND. We do not know how many conditions are going in the query till runtime. This search is for filter control, where the user can choose multiple criteria for filtering. Select from table where table.col = 1 or table.col = 2 or table.col = 7 .... 'Other number of conditions Before I just create the SQL query as a string, while looping over all the situations. However, it seems that there should be a good way to do this in LINQ. I tried to use Expression trees, but they had a second thought for this moment on my head, where the lambda function was to be executed inside the statement such as: values ​​for matchingRows = matchingRows for each value Where (function (row) row.c...
    Read more

    asp.net mvc - Dynamically Generated Ajax.BeginForm -

    I have a problem with ASP.NET MVC Ajax forms. I generate many Ajax form in a table such as: & Lt; Input type = "submit" name = "activity" value = "add activity" / & gt; & Lt;%}% & gt; & Lt; / TD & gt; & Lt; / TR & gt; & Lt;%}% & gt; So far so good. When I post one of those forms, it gives a partial view in a div, and in this new partial view a new Ajax Beginnform (which is not in Genesis form) This second Ajax Beginnorf is exactly like the ones I got on the table, but when I post it, I do not get the "Ajax Post", but a normal post that sends me to a new page, I do not know whether the two Ajax forms What is the reason for the difference between, why is it the "dynamically generated" Ajax form behaves like a normal HTML form? By the way, I know that I can do it in different ways using javascript, but I would like to understand whether it can only be done using MVC helplars and Ajax lib...
    Read more

    Debug on symbian -

    I am using trk for phone debug This works well for the Holorld project But when I start the project in phone debug mode 1) the load failed 2) TrkProtocolPlugin: to target the specified file Failure (please verify If any body understands what problem I am experiencing, then this problem helps me Pre-release If the application has the privileges assigned (with the appropriate certificate) itemprop = "text" > In your case, I will check: / li> If there is no conflict of application ID with any other application of device If there are problematic commands in the installation package (for example copy copy for non-accessible directories)
    Read more