Read PowerPoint ppt pptx using Apache Poi in java!

HelloPoi.java

import java.io.*;

import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.POIXMLProperties.*;
import org.apache.poi.xslf.usermodel.*;

public class HelloPoi {

	public static void main(String[] args) {
		
		String fileName;
		
		if (args.length > 0) {
			fileName = args[0];
		} else {
			System.out.println("No file name specified.");
			return;
		}
			
		FileInputStream inputStream;
		
		try {
			inputStream = new FileInputStream(fileName);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			return;
		}
		
		XMLSlideShow ppt;
		
		try {
			ppt = new XMLSlideShow(inputStream);
		} catch (IOException e) {
			e.printStackTrace();
			return;
		}

		readPPT(ppt);
	}

	public static void readPPT(XMLSlideShow ppt) {
        CoreProperties props = ppt.getProperties().getCoreProperties();
        String title = props.getTitle();
        System.out.println("Title: " + title);
        
        for (XSLFSlide slide: ppt.getSlides()) {
        	System.out.println("Starting slide...");
        	XSLFShape[] shapes = slide.getShapes();
        	for (XSLFShape shape: shapes) {
        		if (shape instanceof XSLFTextShape) {
        	        XSLFTextShape textShape = (XSLFTextShape)shape;
        	        String text = textShape.getText();
        	        System.out.println("Text: " + text);
        		}
        	}
        }	 
	}	
}

Thanks adam for writing this & showing sample code to work with apache poi ppt files.
I am right now working on writing simple prog to compare two ppt files . I have used apache poi & was able to fetch shapes of slide using getShapes() . Now since my ppt contains images , shape is of XSLFPictureShape type. Can you tell me how should I compare these XSLFPictureShape objects .

Thanks