GetPath() vs getCanonicalPath
Can someone explain the difference between these two methods in a way that a newbie will understand? I looked at the file class ( http://java.sun.com/j2se/1.4.2/docs/api/java/io/File.html ) but i did not understand the difference very well. Thanks in advance.
Easiest way is to try it.
One difference though is that the canonical is going to look more like a standard path for the current OS.
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DefaultMutableTreeNode.getPath() returns incomplete path
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I'm using a JTree with nodes derived from DefaultMutableTreeNode and without a
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Everytime I close a node (collapseNode) I delete all subnodes
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Question related to GetFile and GetPath of a URL
Hello, i have the following code and i was wondering why GetFile and GetPath shall return the same output,
e.g. my example here is http://wikis.sun.com/display/SunForums/Tips
The GetPath returns : Get Path of URL /display/SunForums/Tips
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the same.
Well it's just that i would like to use a method which is going to output only the File of a Path, in our example the output should be only Tips.
CODE :
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.*;
public class Main {
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BufferedReader in = null;
try { //try
URL yahoo = new URL("http://wikis.sun.com/display/SunForums/Tips");
String url_string = yahoo.toString(); // Constructs a string representation of URL
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catch (MalformedURLException ex) {
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Unexpected result from treenode.getPath() ???
Hi,
I am using Jtree in application.
The tree is as following
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-C:\
- Folder1
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- D:\I want to expend the node Folder1 as selected node. To do that I got the FileNode Folder1 and do
TreePath path=new TreeaPath( folder1node.getPath() );
int row=tree.getRowForPath(path);
jtreetable.expend(row);
But the problem is with the path returned. I must get the path [Desktop, C:\, Folder1] but I am getting path [Folder1].
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ThanksAndy,
You should contact support with regards to this issue. It is a known
problem, you can reference CR042529.
Cheers!
Adam
"Andy Kimbrough" <[email protected]> wrote in message
news:3ae8b1f7$[email protected]..
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Why got Nullpointer use getJarPath.class.getResource(".").getPath() ?
hi,
I have a question about the following program:
public class getJarPath {
public getJarPath() {
public static void main(String[] arg) {
System.out.println("java.net.URl->" + getJarPath.class.getResource(
"getJarPath.class"));
System.out.println("getPath->" + getJarPath.class.getResource(
"getJarPath.class").getPath());
System.out.println("getFile->" + getJarPath.class.getResource(
"getJarPath.class").getFile());
System.out.println("getPath with . ->"+getJarPath.class.getResource(".").getPath()); // NullPointer occured
1. compile getJarPath.java
D:\>D:\j2sdk1.4.2_04\bin\javac getJarPath.java
2. run this test program with "java getJarPath"
D:\>D:\j2sdk1.4.2_04\bin\java getJarPath
java.net.URl->file:/D:/getJarPath.class
getPath->/D:/getJarPath.class
getFile->/D:/getJarPath.class
getPath with . ->/C:/Program%20Files/exceed.nt/
3. D:\>D:\j2sdk1.4.2_04\bin\jar cvf getJarPath.jar getJarPath.class
4. D:\>D:\j2sdk1.4.2_04\bin\java -cp d:\getJarPath.jar getJarPath
java.net.URl->jar:file:/D:/getJarPath.jar!/getJarPath.class
getPath->file:/D:/getJarPath.jar!/getJarPath.class
getFile->file:/D:/getJarPath.jar!/getJarPath.class
Exception in thread "main" java.lang.NullPointerException
at getJarPath.main(getJarPath.java:15)
question:
in step 2. why the path "." is "/C:/Program%20Files/exceed.nt/" ?
in step 4. why NullPointerException occured?
thank a lot
BRYour output seems to indicate that all lines executed successfully, yet you say there's a NullPointerException. Which is it?
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Hi everybody,
I've a problem with my application web. I want to get the url of a file. I use JBoss 4.0.5. My code is:
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String path = nombre.replace('.', '/');
// Ask for all resources for the path
Enumeration<URL> resources;
resources = cld.getResources(path);
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}It is'nt finished but it's a example that I find it.
In a main function, it's works fine but in a method not.
Thanks!Have a look at the documentation. You mite have misunderstood. Try toString() or toExternalForm().
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Thanks Much,
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Hi,
I'm trying to figure out exactly what the piece of code at the bottom of the page does. I now that in general it returns true if the file specified is a directory that contains a file called pkgFileName(whatever that variable may be).
The bit I can't figure out is
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Hi everyone:
I am newer for Lucene which is used to build a search eigneer in my J2EE project.
But I can hardly understand how it works because of my poor English.
So I need you help:
* TxtFileIndexer.java
* Created on 2006�N12��8��, ����3:46
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package classes.php.lucene;
* @author eingmarra
import java.io.File;
import java.io.FileReader;
import java.io.Reader;
import java.util.Date;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.store.FSDirectory;
public class TxtFileIndexer {
public String test() {
return "test is ok hohoho";
* @param args
public String createIndex(String indexDir_path,String dataDir_path) throws Exception {
String result = "";
File indexDir = new File(indexDir_path);
File dataDir = new File(dataDir_path);
Analyzer luceneAnalyzer = new StandardAnalyzer();
File[] dataFiles = dataDir.listFiles();
IndexWriter indexWriter = new IndexWriter(indexDir,luceneAnalyzer,true);
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for(int i=0; i < dataFiles.length; i++) {
if(dataFiles.isFile() && dataFiles[i].getName().endsWith(".html")) {
result += "Indexing file" + dataFiles[i].getCanonicalPath()+"<br />";
Document document = new Document();
Reader txtReader = new FileReader(dataFiles[i]);
document.add(Field.Text("path",dataFiles[i].getCanonicalPath())); //can not pass the Netbeans IDE, maybe the Field class is not support the signature of the fuction Text anymore!!
document.add(Field.Text("contents",txtReader)); //can not pass the Netbeans IDE, maybe the Field class is not support the signature of the fuction Text anymore!!
indexWriter.addDocument(document);
indexWriter.optimize();
indexWriter.close();
long endTime = new Date().getTime();
result += "It takes"+(endTime-startTime)
+ " milliseconds to create index for the files in directory "
+ dataDir.getPath();
return result;
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String queryStr = ss;
String result = "Result:<br />";
//This is the directory that hosts the Lucene index
File indexDir = new File(index_path);
FSDirectory directory = FSDirectory.getDirectory(indexDir,false);
IndexSearcher searcher = new IndexSearcher(directory);
if(!indexDir.exists()){
result = "The Lucene index is not exist";
return result;
Term term = new Term("contents",queryStr.toLowerCase());
TermQuery luceneQuery = new TermQuery(term);
Hits hits = searcher.search(luceneQuery);
for(int i = 0; i < hits.length(); i++){
Document document = hits.doc(i);
result += "<br /><a href='getfile.php?w="+ss+"&f="+document.get("path")+"'>File: " + document.get("path")+"</a>\n";
return result;
the code above is from google and it works perfectly in the Lucene1.4. But it not pass the compiler by Netbeans IDE because I use Lucene2.0
If you have some idea,plz replace these two lines' code with the correct ones.
Thanks a lot !!Hi everyone:
I am newer for Lucene which is used to build a search eigneer in my J2EE project.
But I can hardly understand how it works because of my poor English.
So I need you help:
* TxtFileIndexer.java
* Created on 2006�N12��8��, ����3:46
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package classes.php.lucene;
* @author eingmarra
import java.io.File;
import java.io.FileReader;
import java.io.Reader;
import java.util.Date;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.store.FSDirectory;
public class TxtFileIndexer {
public String test() {
return "test is ok hohoho";
* @param args
public String createIndex(String indexDir_path,String dataDir_path) throws Exception {
String result = "";
File indexDir = new File(indexDir_path);
File dataDir = new File(dataDir_path);
Analyzer luceneAnalyzer = new StandardAnalyzer();
File[] dataFiles = dataDir.listFiles();
IndexWriter indexWriter = new IndexWriter(indexDir,luceneAnalyzer,true);
long startTime = new Date().getTime();
for(int i=0; i < dataFiles.length; i++) {
if(dataFiles.isFile() && dataFiles[i].getName().endsWith(".html")) {
result += "Indexing file" + dataFiles[i].getCanonicalPath()+"<br />";
Document document = new Document();
Reader txtReader = new FileReader(dataFiles[i]);
document.add(Field.Text("path",dataFiles[i].getCanonicalPath())); //can not pass the Netbeans IDE, maybe the Field class is not support the signature of the fuction Text anymore!!
document.add(Field.Text("contents",txtReader)); //can not pass the Netbeans IDE, maybe the Field class is not support the signature of the fuction Text anymore!!
indexWriter.addDocument(document);
indexWriter.optimize();
indexWriter.close();
long endTime = new Date().getTime();
result += "It takes"+(endTime-startTime)
+ " milliseconds to create index for the files in directory "
+ dataDir.getPath();
return result;
public String searchword(String ss,String index_path) throws Exception {
String queryStr = ss;
String result = "Result:<br />";
//This is the directory that hosts the Lucene index
File indexDir = new File(index_path);
FSDirectory directory = FSDirectory.getDirectory(indexDir,false);
IndexSearcher searcher = new IndexSearcher(directory);
if(!indexDir.exists()){
result = "The Lucene index is not exist";
return result;
Term term = new Term("contents",queryStr.toLowerCase());
TermQuery luceneQuery = new TermQuery(term);
Hits hits = searcher.search(luceneQuery);
for(int i = 0; i < hits.length(); i++){
Document document = hits.doc(i);
result += "<br /><a href='getfile.php?w="+ss+"&f="+document.get("path")+"'>File: " + document.get("path")+"</a>\n";
return result;
the code above is from google and it works perfectly in the Lucene1.4. But it not pass the compiler by Netbeans IDE because I use Lucene2.0
If you have some idea,plz replace these two lines' code with the correct ones.
Thanks a lot !! -
I'm sure this one has been asked a million times before, but a search of the forums hasn't proved particularly positive - so, apologies if this is a duplicate post, but...
How on earth does one get the full path of a file??? I mean, starting from the very root directory?
I'm sure there must be some kind of recursive method that loops back through the directories and eventually returns a string with the full path name - but I can't figure it out. I've tried getPath(), getCanonicalPath()... etc etc, but so far with no joy...
P.S. I need the full path as I am writing a servlet to delete files from my server and I need to pass the full path to the delete() method.... Or at least I assume that is the way to do it, and at least, writing in the path name manually works fine. The problem is that since the folders are created dynamically when the files are first uploaded, I have to find a way of retrieving the whole structure... do I not?
A second, and possibly related problem, is that the getCanonicalPath() method returns a directory for the chosen file - but it seems to retun the wrong one! ie, it only returns /bin/file - and the file is definitely not in /bin!I tried that too - still didn't work. But now I think the problem is more to do with the fact that my files are stored on my server because when I try my method in a static context elsewhere on my computer it seems to work fine. Can't figure out what the problem might be...
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r.exec(path);
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set javaTestProjectPath=D:\projects\CIGTAF\LRTestCases
C:
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javac -verbose %javaTestProjectPath%\src\com\core\testscripts\Mailsetup.java -d %javaTestProjectPath%\bin
javac -verbose %javaTestProjectPath%\src\com\core\testscripts\MailAuthenticator.java -d %javaTestProjectPath%\bin
javac -verbose %javaTestProjectPath%\src\com\core\testscripts\ReadData.java -d %javaTestProjectPath%\bin
javac -verbose %javaTestProjectPath%\src\com\core\testscripts\ReadWriteExcelResults.java -d %javaTestProjectPath%\bin
javac -verbose %javaTestProjectPath%\src\com\core\testscripts\SeleniumFramework.java -d %javaTestProjectPath%\bin
java org.testng.TestNG %javaTestProjectPath%\SelXD-Config.xml -d %javaTestProjectPath%\test-output
none of these are getting executed.
regards
Edited by: 887789 on May 4, 2012 1:46 AM -
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Because of a legacy string limitation, I have a list of files in 8.3 format. The actual files are saved with long names. How can I get the long name from the short name?
In JavaScript, I would get a file system object and get the file object from there with the short name. Then it's no problem to get the full name. But I don't see anything in Java that matches that. ???
Ideas?
Frank Perry, MSEEHere is what I did.
String displayName = "somefi~1.txt";
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Dear all,
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label.addMouseMotionListener(this);
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Theres nothing wrong in ur code.
the only problem is in IE's version of java(WFC) the File class doesnot have a getAbsolutePath() mehtos instead it uses the getFullPath() method which isn't there in the actual java class.Thats the reason why ur code isn't working on IE.Infact IE(WFC) doesn't implement any of the following methods
getPath()
getCanonicalPath()
getParent()
getparentFile()
createNewFile()
etc
Maybe u could pass the path of the Image file as a parameter to the applet and then try to display it on the JLabel.
Hope that helps.
Regards,
Partha -
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Hi,
My program is working #1 when I create a MediaLocator like that:
mediaLocator = new MediaLocator(file.toURL());
But I know that toURL is depreciated so I changed it to
mediaLocator = new MediaLocator(file.toURI().toURL());
And now, when my path contain spaces, it create a folder with %20 instead of space...
For exemple:
c:\Documents%20and%20Settings
instead of
c:\Documents and Settings
Thanks for help!This works for me - with my videos in
C:\Workspace\JMF\src\\jmf\My videos
private void playFile(File f) throws Exception{
System.out.println("file - '" + f.getPath()+ "'");
MediaLocator mL= new MediaLocator("file:" + f.getCanonicalPath());
DataSource dS = Manager.createDataSource(mL);
Processor proc = Manager.createProcessor(dS);
proc.addControllerListener(this);
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I have a file created in java , how do i get the directoypath on an easy way with the name of the file. Is there a methode? Or to I have to play with strings?
If you created a file you must hava a File object. The File object has a number of methods to obtain the full path of the file, check out: getAbsolutPath, getCanonicalPath, getParent, getPath, etc.
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