Template Files For Processing Applications in NetBeans

P5Library.java

<#assign licenseFirst = "/*">
<#assign licensePrefix = " * ">
<#assign licenseLast = " */">
<#include "../Licenses/license-${project.license}.txt">

<#if package?? && package != "">
package ${package};
</#if>

/**
 *
 * @author ${user}
 * @modified ${date}
 * @version ${version}
 */

import processing.core.PApplet;

public class ${name} {

    private static PApplet parent;
    public final String VERSION = "0.01";
    /**
    * ${name} constructor
    * @param parent PApplet
    */
    public ${name}(PApplet parent) {
        this.parent = parent;
        this.parent.registerMethod("dispose", this);
    }

    
    public void dispose() {
         //this is a required method
    }

}

P5Main.java

<#assign licenseFirst = "/*">
<#assign licensePrefix = " * ">
<#assign licenseLast = " */">
<#include "../Licenses/license-${project.license}.txt">

import processing.core.*;

/**
*
* @author ${user}
*/
@SuppressWarnings("serial")
public class ${name} extends PApplet{

@Override
public void setup(){
    size(300, 300, P3D);
}

@Override
public void draw(){
}

/**
 * @param passedArgs the command line arguments
 */
static public void main(String[] passedArgs) {
    String[] appletArgs = new String[] {${name}.class.getName()};
    if (passedArgs != null) {
      PApplet.main(concat(appletArgs, passedArgs));
    } else {
      PApplet.main(appletArgs);
    }
  }
}

P5Other.java

<#assign licenseFirst = "/*">
<#assign licensePrefix = " * ">
<#assign licenseLast = " */">
<#include "../Licenses/license-${project.license}.txt">

<#if package?? && package != "">
package ${package};

</#if>
/**
 *
 * @author ${user}
 */

import processing.core.PApplet;

public class ${name} {

    private static PApplet parent;
    
    /**
    * ${name} constructor
    * @param parent PApplet
    */
    public ${name}(PApplet parent) {
        this.parent = parent;
    }

}

I used your template files in this tutorial, i hope its ok
https://www.youtube.com/watch?v=MLiCJ64I8gs