CODEWITHSUNDEEP
javafilepath
Roman Rdgz
Roman Rdgz

Reputation: 13254

Getting the right slash for each platform

I have a JFilechooser to select a filename and path to store some data. But I also want to store an additional file in the same path, same name but different extension. So:

File file = filechooser.getSelectedFile();
String path = file.getParent();
String filename1 = file.getName();

// Check the extension .ext1 has been added, else add it
if(!filename1.endswith(".ext1")){
    filename2 = filename1 + ".ext2";
    filename1 += ".ext1";
}
else{
    filename2 = filename1;
    filename2 = filename2.substring(0, filename2.length-4) + "ext2";
}

// And now, if I want the full path for these files:
System.out.println(path); // E.g. prints "/home/test" withtout the ending slash
System.out.println(path + filename1); // E.g. prints "/home/testfilename1.ext1"

Of course I could add the "/" in the middle of the two strings, but I want it to be platform independent, and in Windows it should be "\" (even if a Windows path file C:\users\test/filename1.ext1 would probably work).

I can think of many dirty ways of doing this which would make the python developer I'm carrying inside cry, but which one would be the most clean and fancy one?

Upvotes: 1

Views: 110

Answers (3)

Ingo
Ingo

Reputation: 36329

Just use the File class:

System.out.println(new File(file.getParent(), "filename1"));

Upvotes: 1

Jacopo Boari
Jacopo Boari

Reputation: 31

You can use:

System.getProperty("file.separator");

Upvotes: 0

René Link
René Link

Reputation: 51343

You can use the constants in the File class:

File.separator // e.g. / or \
File.pathSeparator // e.g. : or ;

or for your path + filename1 you can do

File file = new File(path, filename1);
System.out.println(file);

Upvotes: 3

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