Thread: Method calls/initialization issues

Hi there,

First time posting here - wondering if anyone could lend a hand!
I'm making an import/export of xml - I have the import of xml sorted I'm just trying to finish off the export.
My export class is called XmlWriter.java


Inside the class I have an updateFile method to update an xml file as such:

public void updateFile(Environment environment,Document doc)
{
 // code
}

I then in my main method have

public static void main(String argv[]){
 
               //declare new object of class
              XmlWriter xmlWriter = new XmlWriter();   
 
               //test testUpdate method
               //     xmlWriter.testUpdate();
 
              Environment environment = ;
              Document doc = ;
 
               //call method to update
              xmlWriter.updateFile(environment,doc);
 
               //call method to export
 
 
       }

I don't know what to make my variables equal to - eclipse keeps trying to use null but obviously that won't work. The Environment is another class that just contains getters and setters for the 3 different databases (that are in the xml file) and the getter/setter for the environment ID (also in xml file). Any help would be appreciated as I'm confused as to what to set the variables to :S

The classes Document and Enviroment, where they written by you? Are they part of some third party library? Or were they written by your instructor / teacher / etc?

Usually you should simply read the API or the source code of the class you want to use if you want to know which constructor to call.