<div>
What exactly is the problem?
</div>


<div>
What is it that you're trying to accomplish?<br />
<br />
I can point out a few things I notice with your posted code:<br />
- The &quot;writeJsonSimpleDemo&quot; class has only one static method, so there's really no reason you'd ever need to instantiate an object of that type. You should just be using it like<br />

<pre><code class="code-1 nolinks" id="code-20-42829551-1"><span>writeJsonSimpleDemo.writeJsonSimpleDemo(filename);</span>
</code></pre>
- The following line is basically a no-op:<br />

<pre><code class="code-1 nolinks" id="code-20-42829551-2"><span>class1.equals(&quot;example.json&quot;);</span>
</code></pre>
If you check the documentation, you'll see that the &quot;equals&quot; method returns a boolean specifying whether or not the objects are equals. Since you're comparing a &quot;writeJsonSimpleDemo&quot; object with a String object, it will never be equal, so that call will return false. But nothing is done with that result.<br />
- &nbsp;As per Java standards, the file should have the extension &quot;.java&quot;, not &quot;.txt&quot;. The class name should also be capitalized: WriteJsonSimpleDemo
</div>


<div>
A customer will pass me a JSON file each day for a consumer. I am trying to output the JSON file to file, where I can use the tags to fill in a PDF template. &nbsp;Currently I am hard coding the field names into the file. &nbsp;I would like to replace the hard coded filed names with the JSON tags. <br />
<br />
Example below:<br />
PDTextField A0 = (PDTextField) acroForm.getField(&quot;textnam<wbr />e&quot;);<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; A0.setValue(&quot;Michael D. Hughes&quot;); &nbsp;<br />
****A0,setValue should pointing to JSON tagname.<br />
<br />
I will include a sample of the &nbsp;java pdf template class. &nbsp; Let me know if I am proceeding in the correct direction.<br />
<a href="https://filedb.experts-exchange.com/incoming/2019/03_w13/1416145/pdf_template.txt" target="_blank" class="file-inline" title="pdf_template.txt (17 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>pdf_template.txt</a>
</div>


pdf_template.txt

<div>
If you want to write the JSON to a file you should pass the filename as argument:<br />
<br />

<pre><code class="code-1 nolinks" id="code-20-42830083-1"><span>public static void main(String[] args)  {</span>
<span>        writeJsonSimpleDemo class1 = new writeJsonSimpleDemo();</span>
<span>        class1.writeJsonSimpleDemo(file path here);</span>
<span>    }</span>
</code></pre>
</div>


<div>
The approach I would suggest would be to have one method that reads the JSON file, putting the field names and values into a Map, and returning the Map.<br />
Then create a second method that that creates the PDF file (much like you already have), but it would take in as a parameter the Map generated from the previous method, reading the name/value pairs from the Map, and writing them into the PDF file.
</div>


<div>
Jan, Can you provide me example of that, if possible?
</div>


<div>
Which part are you stuck on?
</div>


<div>
All of it. &nbsp;I am totally new to the Java world. &nbsp;Reading online tutorials and looking at online videos. &nbsp; I understand the concept. &nbsp;But I haven't heard the term of &nbsp;putting the field names into a map. &nbsp;Then calling the map in another class. &nbsp;I think that is what I was trying to do in earlier conversations.
</div>


<div>
Jan, If you are still available. I was able to create the json into map. I am having a issue turning it into a parameter to <br />
fill the &nbsp;PDF. &nbsp;Can you show me a sample of how to reference the map in another class?<br />
<br />
&nbsp;<br />
***Create a second method that that creates the PDF file (much like you already have), but it would take in as a parameter the Map generated from the previous method, reading the name/value pairs from the Map, and writing them into the PDF file.
</div>


<div>
Something like this:<br />
<br />

<pre><code class="code-10 nolinks" id="code-20-42832337-1"><span>   public void createPdf(Map&lt;String, String&gt; fieldValues)</span>
<span>   {</span>
<span>      String formTemplate = &quot;C:/PdfBox_Examples/Demo/DisabilityIncome_Template.pdf&quot;;</span>
<span></span>
<span>      try (PDDocument pdfDocument = PDDocument.load(new File(formTemplate)))</span>
<span>      {</span>
<span>         // get the document catalog/</span>
<span>         PDAcroForm acroForm = pdfDocument.getDocumentCatalog().getAcroForm();</span>
<span></span>
<span>         // as there might not be an AcroForm entry a null check is necessary</span>
<span>         if (acroForm != null)</span>
<span>         {</span>
<span>            for (String fieldName : fieldValues.keySet())</span>
<span>            {</span>
<span>               PDTextField pdfField = (PDTextField) acroForm.getField(fieldName);</span>
<span>               pdfField.setValue(fieldValues.get(fieldName));</span>
<span>            }</span>
<span>         }</span>
<span></span>
<span>         // Save and close the filled out form.</span>
<span>         // pdfDocument.save(&quot;target/FillFormField.pdf&quot;);</span>
<span>         pdfDocument.save(&quot;C:/PDFBox_Examples/Demo/DisabilityIncome_Application.pdf&quot;);</span>
<span>      }</span>
<span>   }</span>
</code></pre>
</div>


<div>
i created a simple json file below. I expecting the name field to output the pdf file, &nbsp;The pdf file never gets updated with the name &quot;Mike&quot; . The only output i seen in the results is the word green.<br />
<br />
&nbsp; &quot;id&quot;: 1,<br />
&nbsp; &quot;name&quot;: &quot;Mike&quot;,<br />
&nbsp; &quot;price&quot;: 12.50,<br />
&nbsp; &quot;tags&quot;:[&quot;home&quot;,&quot;green&quot;]<br />
}
</div>


<div>
Did you get it worked out? Or is it still not working right?
</div>


<div>
Can you post your code, and we can try to figure out what's wrong?
</div>


<div>
I am enclosing the three files I am using. The first json map file it outputs the name element. The second is the definition. &nbsp;The third file is the create pdf. &nbsp;The class completes with no errors but does not output the file. &nbsp;I would have expected the name element to be filled in in the pdf filebut the file never gets created.<br />
<a href="https://filedb.experts-exchange.com/incoming/2019/04_w14/1416647/JSON_MAP.txt" target="_blank" class="file-inline" title="gets the name element (1 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>JSON_MAP.txt</a><br />
<a href="https://filedb.experts-exchange.com/incoming/2019/04_w14/1416648/mypojo_definition.txt" target="_blank" class="file-inline" title="definition of the JSON file (673 bytes)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>mypojo_definition.txt</a><br />
<a href="https://filedb.experts-exchange.com/incoming/2019/04_w14/1416649/createPDF.txt" target="_blank" class="file-inline" title="create pdf document (1 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>createPDF.txt</a>
</div>


createPDF.txt

mypojo_definition.txt

JSON_MAP.txt

<div>
You have code in these 3 separate files. Where is the code that combines and calls them?
</div>


<div>
I thought I was calling each step as I building them. Take a look at the word document enclosed. &nbsp;I might be making the call steps incorrectly please let me know.<br />
<a href="https://filedb.experts-exchange.com/incoming/2019/04_w14/1416657/completeStep.docx" target="_blank" class="file-inline" title="Steps to complete the entire process. (16 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>completeStep.docx</a>
</div>


completeStep.docx

<div>
That looks like it just contains the 3 separate documents from before.
</div>


<div>
I am still a new developer? I have to read up on calling class functions. &nbsp;Any example/directions you can give will be helpful.
</div>


<div>
For this project, you might want to put all of the methods in a single class, and then have one main() function that calls those other methods.
</div>


<div>
I am still having issues referencing all classes in one file. Can you tell me how to reference a class that already has main class(JSONToMAP)? Can you tell me if I am referencing Mypojo correctly. Should I be referencing the simple.json in the call statement.<br />
<a href="https://filedb.experts-exchange.com/incoming/2019/04_w14/1416766/createPDF2.txt" target="_blank" class="file-inline" title="file that contains multiple classes (1 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>createPDF2.txt</a>
</div>


createPDF2.txt

<div>
You want a class something like this:<br />
<br />

<pre><code class="code-10 nolinks" id="code-20-42835005-1"><span>public class CreatePDF {</span>
<span>   </span>
<span>    public static void main(String[] args) throws IOException</span>
<span>    {</span>
<span>       Map&lt;String, String&gt; fieldValues = loadFieldValuesFromJSON();</span>
<span>       createPdf(fieldValues);</span>
<span>    }</span>
<span>    </span>
<span>    public static Map&lt;String, String&gt; loadFieldValuesFromJSON() throws IOException</span>
<span>    {</span>
<span>       // TODO: Code that reads the JSON file into a Map&lt;String, String&gt; ...</span>
<span>    }</span>
<span>    </span>
<span>    public void createPdf(Map&lt;String, String&gt; fieldValues) throws IOException</span>
<span>    {</span>
<span>        String formTemplate = &quot;C:/PdfBox_Examples/Demo/DisabilityIncome_Template.pdf&quot;;</span>
<span></span>
<span>        try (PDDocument pdfDocument = PDDocument.load(new File(formTemplate)))</span>
<span>        {</span>
<span>            // get the document catalog/</span>
<span>            PDAcroForm acroForm = pdfDocument.getDocumentCatalog().getAcroForm();</span>
<span></span>
<span>            // as there might not be an AcroForm entry a null check is necessary</span>
<span>            if (acroForm != null)</span>
<span>            {</span>
<span>                for (String fieldName : fieldValues.keySet())</span>
<span>                {</span>
<span>                    PDTextField pdfField = (PDTextField) acroForm.getField(fieldName);</span>
<span>                    pdfField.setValue(fieldValues.get(fieldName));</span>
<span>                }</span>
<span>            }</span>
<span></span>
<span>            // Save and close the filled out form.</span>
<span>            // pdfDocument.save(&quot;target/FillFormField.pdf&quot;);</span>
<span>            pdfDocument.save(&quot;C:/PDFBox_Examples/Demo/DisabilityIncome_Application.pdf&quot;);</span>
<span>        }</span>
<span>    }</span>
<span>}</span>
</code></pre>
</div>


<div>
I thought the code that was receiving the json file was from mypojo? &nbsp;So do I not call the mypojo file? I am not sure what to put in that line of code.
</div>


<div>
You can use MyPojo, if you like. I just didn't see how you were from that object to a Map.<br />
<br />
Or, if the MyPojo object has all the fields you need, then perhaps you can pass that into the createPdf() method, instead of a Map, and read the fields out of that instead.
</div>


<div>
Jan, I will take whatever suggestion you think will work. &nbsp;My goal right now is get the fields from json file into the pdf. If we can get the createPDF class with the 4 json fields that would great accomplishment.
</div>


centralmike

<div>
Thanks for your help Jan, This solution solved my problem. &nbsp;Also an excellent insight on working with Java/javascript and JSON. &nbsp;Sorry for the late response, I had leave to on family emergency.
</div>


<div>
No worries at all! Glad you got it worked out!
</div>


<div>
<div class="content wysiwyg-content">
I have a problem passing a class to another class in java. &nbsp;Doesn't show an error message. &nbsp;So I am not sure what's going on. &nbsp;The file I am inquiring about is called TestJasoncallingMethod.txt<wbr />. &nbsp;This is a two part question. &nbsp;after I create the JSON file I would to like to use it in Java class filling a pdf file.<br />
<a href="https://filedb.experts-exchange.com/incoming/2019/03_w13/1416075/testJasoncallingMethod.txt" target="_blank" class="file-inline" title="testJasoncallingMethod.txt (926 bytes)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>testJasoncallingMethod.txt</a>
</div>
</div>


testJasoncallingMethod.txt

I have a problem passing a class to another class in java.  Doesn't show an error message.  So I am not sure what's going on.  The file I am inquiring about is called TestJasoncallingMethod.txt.  This is a two part question.  after I create the JSON file I would to like to use it in Java class filling a pdf file.

Converting JSON into JAVA CODE - new developer.

JavaScript Object Notation, or JSON, is human-readable text used when transmitting data objects consisting of attribute:value pairs between a server and a web application as an alternative to XML. JSON, while it is originally derived from JavaScript, is a language-independent data format. Code for parsing and generating JSON data is available in many programming languages.

JSON

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.