java.io.File - Files do not exist

[TannerLD]

Hi all,

I'm trying to make a program copy files, but I'm having more trouble getting Java to recognize the files via the java.io.File object. Whenever I call whateverFile.exists() it returns false, even though the path of the file is correct.

import java.io.File;
import java.net.URI;
import java.net.URISyntaxException;

public class TestFiles {
	public static void main(String args[]) throws URISyntaxException
	{
                //These two lines do not work, but the paths are correct and the files exist.
		//File source = new File(new URI("file:///Volumes/public/buzzer.wmv"));
		//File source = new File("/Users/tanner/Desktop/buzzer.wmv");

                //This line works.
		File source = new File("TestFiles.java");
		
		System.out.println("Exists: "+source.exists());
	}
}

Am I missing something, because this seems like it should work?

Thanks
-Tanner

[mrmatt1111]

Try this:

import java.io.File;
import java.net.URI;
import java.net.URISyntaxException;

public class TestFiles {
   public static void main(String args[]) throws URISyntaxException
   {
      //These two lines do not work, but the paths are correct and the files exist.
      //File source = new File(new URI("file:///Volumes/public/buzzer.wmv"));

      //This line works.
      //File source = new File("/Users/tanner/Desktop/buzzer.wmv");

      TestFiles base = new TestFiles();

      String path = base.getClass().getResource("").toString();
      System.out.println(path+"TestFiles.java");

      File source = new File(path+"TestFiles.java");

      System.out.println("Exists: "+source.exists());
   }
}

[TannerLD]

Try this:

[code removed for length's sake]

That does not work.

I think I made this confusing in my first post (I'll edit it to reflect this):

Does Not Work (both - what I need/want):
File source = new File(new URI("file:///Volumes/public/buzzer.wmv"));
File source = new File("/Users/tanner/Desktop/buzzer.wmv");

Works (but not what I want):
File source = new File("TestFiles.java");

Thanks
-Tanner

[mrmatt1111]

Oops, sorry, paths are such a pain in java, hehe.

TestFiles base = new TestFiles();

String path = base.getClass().getResource("").toString();
System.out.println(path);

This gives you a relative path to where things will be at run time if you don't happen to know the actual path on the machine you run it on. You could put your files there. Otherwise you will have to give an exact path to the file.

[TannerLD]

Oops, sorry, paths are such a pain in java, hehe.

TestFiles base = new TestFiles();

String path = base.getClass().getResource("").toString();
System.out.println(path);

This gives you a relative path to where things will be at run time if you don't happen to know the actual path on the machine you run it on. You could put your files there. Otherwise you will have to give an exact path to the file.

Thanks, but I can't move all the files to the source code directory due to the amount of them being in the several hundred gigabytes, which is why I'm trying to copy a specific one from the /Volumes/public/Music path. That's what I'm trying to get at.

Still confusing? :\

-Tanner

[mrmatt1111]

This should give you the path:

javax.swing.JFileChooser fileChooser = new javax.swing.JFileChooser();

int ok = fileChooser.showOpenDialog(null);
if(ok == javax.swing.JFileChooser.APPROVE_OPTION)
{
   File file = fileChooser.getSelectedFile();
   System.out.println(file); //here be dragons... err, your file
}

You can use it once just to locate the correct path.

[serjant]

This should give you the path:

javax.swing.JFileChooser fileChooser = new javax.swing.JFileChooser();

int ok = fileChooser.showOpenDialog(null);
if(ok == javax.swing.JFileChooser.APPROVE_OPTION)
{
   File file = fileChooser.getSelectedFile();
   System.out.println(file); //here be dragons... err, your file
}

You can use it once just to locate the correct path.

System.out.println(file,getAbsolutePath()); //here be dragons... err, your file

[Tolls]

Does Not Work (both - what I need/want):
File source = new File("/Users/tanner/Desktop/buzzer.wmv");

Thanks
-Tanner

OK, this works, where test.txt is located at "C:\test\test.txt":

public static void main(String args[]) {
	File source = new File("/test/test.txt");
	System.out.println(source.exists());
}

So, taking your line above, where is buzzer.wmv located exactly...paste the path here.

[TannerLD]

Ah. I fixed it by simply not using the urge to escape everything that is a file path. They don't need to be. Then it works.

Thanks
-Tanner