package com.aspose.slides.examples.Presentation.Conversion;

import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import com.aspose.slides.examples.Utils;

public class ConvertingPresentationToXPSWithoutXpsOptions {

	public static void main(String[] args) {
		
		// The path to the documents directory.
        String dataDir = Utils.getDataDir(ConvertingPresentationToXPSWithoutXpsOptions.class);
        
		// Instantiate a Presentation object that represents a presentation file
		Presentation pres = new Presentation(dataDir + "demo.pptx");

		// Saving the presentation to XPS document
		pres.save(dataDir + "demo.xps", SaveFormat.Xps);

	}

}

package com.aspose.slides.examples.Presentation.Conversion;

import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import com.aspose.slides.examples.Utils;

public class ConvertingPresentationToXPSWithoutXpsOptions {

	public static void main(String[] args) {
		
		// The path to the documents directory.
        	String dataDir = Utils.getDataDir(ConvertingPresentationToXPSWithoutXpsOptions.class);
        
		// Instantiate a Presentation object that represents a presentation file
		Presentation pres = new Presentation(dataDir + "demo.pptx");

		// Saving the presentation to XPS document
		pres.save(dataDir + "demo.xps", SaveFormat.Xps);

	}

}

Update ConvertingPresentationToXPSWithoutXpsOptions.java