Java SE (Java Platform, Standard Edition)

Hi there,

I'm using the JEditorPane to display some simple html and css - in fact all it is a div of a fixed width containing an abitary amount of text. What I want to do is calculate the height of the div in pixels. In a browser this is easy enough, you just use javascript to look up the div's clientHeight property, but for the life of me I can't workout how to do this using the Swing api in the JEditorPane. It must know how high the whole rendered html is as it knows when to add the vertical scroll bar

As an alternative approach i though i could just set the size of the containing JFrame and then check to see if a vertical scroll bar had appeared, if it had then I would know that the height of the text in the div exceeded the hight of the frame, but the

scrollPane.getVerticalScrollBar().isVisible()

method always seems to return false...

If anyone has any idea how to do this (or rather, what i'm doing wrong) it would be appreciated.

Thanks

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;

import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.UIManager;

public class TextPane extends JFrame {
	  private  JEditorPane pane;
	  private   JScrollPane scrollPane; 	  
	public TextPane(){
	   
	    pane = new JEditorPane();
	    pane.setEditable(true); // Read-only
	    
	   
	    try{
	    	pane.setPage("html-file-that-contains-enough-text-to-cause-the-scroll-bar-to-appear.html");
	    }
	    catch(IOException e){
	    	throw new RuntimeException(e);
	    }	   
	    scrollPane = new JScrollPane(pane,
	    		JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
	    getContentPane().add(scrollPane);


	}

	  public static void main(String[] args) {
		    try {
		        UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
		    } catch (Exception evt) {}
		  
		    TextPane f = new TextPane();
		    f.addWindowListener(new WindowAdapter() {
		      public void windowClosing(WindowEvent evt) {
		        System.exit(0);
		      }
		    });
		    f.setSize(400, 300);
		    f.setVisible(true);

		    if(f.scrollPane.getVerticalScrollBar().isVisible()){
	            System.out.println("Scroll Bar is showing");
	        }
	        else{
	            System.out.println("Scroll Bar is not showing");
	        }


		    
		    
		   
		  }

}