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Determining the Capabilities of a Print Service

import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import javax.print.DocFlavor; import javax.print.StreamPrintService; import javax.print.StreamPrintServiceFactory; import javax.print.attribute.Attribute; public class Main {   public static void main(String[] argv) throws Exception {     OutputStream fos = new BufferedOutputStream(new FileOutputStream("filename.ps"));     DocFlavor flavor = DocFlavor.INPUT_STREAM.GIF;     StreamPrintServiceFactory[] factories = StreamPrintServiceFactory         .lookupStreamPrintServiceFactories(flavor, DocFlavor.BYTE_ARRAY.POSTSCRIPT.getMimeType());     StreamPrintService service = factories[0].getPrintService(fos);     Attribute[] attrs = service.getAttributes().toArray();     for (int j = 0; j < attrs.length; j++) {       String attrName = attrs[j].getName();       String attrValue = attrs[j].toString();       System.out.println(attrName);       System.out.println(attrValue);     }   } }