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POOutput is correct on Mac but not on Windows
 

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  1. POOutput is correct on Mac but not on Windows
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    <p>We have a Java program that extracts info from a .xml file, converts it to a string, and then writes the string to a .txt file. The file is then appended to a second .txt file which will holds all the inputs from the multiple .xml files. In Eclipse on a Mac, the program correctly appends all the .xml code to the final .txt file. </p> <p>However when running the same Java program on a Windows computer in Eclipse, the final .txt file does not collect the all the inputs as it did on the Mac. Is there a known difference with reading/writing to files on Windows vs. Mac? Especially when code written initially on a Mac is transferred to a Windows machine? </p> <p>Here's our code:</p> <pre><code>package edu.uci.ics.jung.samples; import java.io.FileWriter; import java.io.BufferedWriter; import java.io.IOException; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.DocumentBuilder; import org.w3c.dom.Document; import org.w3c.dom.NodeList; import org.w3c.dom.Node; import org.w3c.dom.Element; import java.io.File; import java.util.Scanner; public class ReadXMLFile1 { public static void main(String argv[]) throws IOException { //throws ioexception allows the filewriter code below (specifically writing the "t# b" title) //while loop to grab all xml files in the form of name0, name1, name2, etc and perform txt file conversion int numberofgraphs=10; //indicate number of graphs importing/reading/appending int x=0; int b = 0; while (x &lt; numberofgraphs){ FileWriter pagetowrite = new FileWriter("graphtotal1.txt", true); //true says to append string "scannedstuff" to graphtotal.txt (graphtotal.txt can be replaced by any file in visualization folder, you name it!) BufferedWriter now = new BufferedWriter(pagetowrite); //more advanced file writer, included in order to use newLine() method below now.write("t# "+b); //writes the title t# "b" at top of each graph set now.newLine(); //returns to next line of file (helps keep format of original .txt) now.close(); //ends file writing for that line of text file try { String xmlname = ("Untitled"+b+".xml"); File fXmlFile = new File(xmlname); DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder dBuilder = dbFactory.newDocumentBuilder(); Document doc = dBuilder.parse(fXmlFile); doc.getDocumentElement().normalize(); NodeList oList = doc.getElementsByTagName("node"); //writing to txt file the node info for (int temp = 0; temp &lt; oList.getLength(); temp++) { Node oNode = oList.item(temp); if (oNode.getNodeType() == Node.ELEMENT_NODE) { Element fElement = (Element) oNode; String nodename = getTagValue("name", fElement); char nodenumber = nodename.charAt( 1 ); String nodelabel = getTagValue("string", fElement); FileWriter pagetowriteon = new FileWriter("newinput1.txt", true); //true says to append string "scannedstuff" to newinput1.txt (newinput1.txt can be replaced by any file in visualization folder, you name it!) BufferedWriter out = new BufferedWriter(pagetowriteon); //more advanced file writer, included in order to use newLine() method below out.write("v"+ " "); //writes the letter v to indicate a node out.write(nodenumber+" "); //writes number of node created out.write(nodelabel); // writes the name of node..its label out.newLine(); //returns to next line of file (helps keep format of original .txt) out.close(); //ends file writing for that line of text file } } NodeList nList = doc.getElementsByTagName("arc");//writing to txt file the arc info for (int temp = 0; temp &lt; nList.getLength(); temp++) { Node nNode = nList.item(temp); if (nNode.getNodeType() == Node.ELEMENT_NODE) { Element eElement = (Element) nNode; //String arcname = getTagValue("name", eElement); String arcnode1 = getTagValue("From", eElement); char node1 = arcnode1.charAt( 1 ); String arcnode2 = getTagValue("To", eElement); char node2 = arcnode2.charAt( 1 ); String arclabel = getTagValue("string", eElement); FileWriter pagetowriteon = new FileWriter("newinput1.txt", true); //true says to append string "scannedstuff" to newinput1.txt (newinput1.txt can be replaced by any file in visualization folder, you name it!) BufferedWriter out = new BufferedWriter(pagetowriteon); //more advanced file writer, included in order to use newLine() method below out.write("u"+ " "); //writes the letter u to indicate an edge out.write(node1+" "); out.write(node2+ " "); out.write(arclabel); out.newLine(); //returns to next line of file (helps keep format of original .txt) out.close(); //ends file writing for that line of text file } } //an option (mostly for individual graph use with simplegraphview...probably unecessary since simplegraph not used until after Data mining) to write to a newly named textfile so can run simplegraph view without having to change file name File file = new File("newinput1.txt"); //File (or directory) with new name (makes it easy to change one file name here instead of two in code above) File file2 = new File("newinput.txt"); file.renameTo(file2); //this strategy of appending-&gt; keep-&gt; allows you to change one file name for giant append file..Filewriter line below ("graphtotal.txt") //start of appending text file // boolean graphready; //assign if(boolean){ = to true when ready to append if (true){ File file3 = new File ("newinput.txt"); //indicate which file Scanner scan = new Scanner (file3); //read the text file indicated above while (scan.hasNextLine()){ //will loop until no more lines of code detected; this loop reads and appends text to desired file String scannedstuff3 = scan.nextLine(); //converts next line of code to a string FileWriter pagetowriteon = new FileWriter("graphtotal.txt", true); //true says to append string "scannedstuff" to graphtotal.txt (graphtotal.txt can be replaced by any file in visualization folder, you name it!) BufferedWriter out = new BufferedWriter(pagetowriteon); //more advanced file writer, included in order to use newLine() method below //out.write("t# "+b); //writes the title t3 0 at top of each graph set //out.newLine(); //returns to next line of file (helps keep format of original .txt) out.write(scannedstuff3); //writes scanned line of code to new file indicated in FileWriter("desiredfile.txt", true) out.newLine(); //returns to next line of file (helps keep format of original .txt) out.close(); //ends file writing for that line of text file } scan.close(); //ends scanning of txt file indicated } } catch (Exception e) { e.printStackTrace(); } x=x+1; b=b+1; } } private static String getTagValue(String sTag, Element eElement) { NodeList nlList = eElement.getElementsByTagName(sTag).item(0).getChildNodes(); Node nValue = (Node) nlList.item(0); return nValue.getNodeValue(); } } </code></pre>
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      1. POOutput is correct on Mac but not on Windows
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    2. VO
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    1. COAre all the files in the correct directories?
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      1. POOutput is correct on Mac but not on Windows
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    2. CODid you check the file permissions?
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      1. POOutput is correct on Mac but not on Windows
      1. USPatrick Q
 

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