Change the name of the deepest directory in a File object

I have File object in Java which is a directory path:

C:\foo\foo\bar

...and I would like to change this to:

C:\foo\foo\newname

I'm don't mean renaming the actual directory, but, simply modifying the path in the File object. Could someone show me ho开发者_如何学JAVAw I can do this? Do I have to use string functions for this or is there some inbuilt Java function that I can use?

Thanks.

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You can construct one File from another and get the parent directory of a file, combining these:

File orig = new File("C:\\foo\\foo\\bar");
File other = new File(orig.getParentFile(), "newname");

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There is no such method in java that changes path for the File object, however you can get the file path with getPath() or getAbsolutePath(). I think creating a new file at that path would do.

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Try following:

import java.io.File;
public class MainClass {
  public static void main(String[] a) {
    File file = new File("c:\\foo\\foo\\bar");
    file.renameTo(new File("c:\\foo\\foo\\newname"));
  }
}

Hope this helps.

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You can use the string-representation of the File object and search for the last / with indexOf(), then you change the value after it and create a new File object.

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I guess you need to something like this.

String sourcePath = "C:\\foo\\foo\\bar";
String newName = "newname";
File source = new File(sourcePath);
File dest = new File(source.getParent() + File.separator + newName);
source.renameTo(dest);

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I think you can only create a new File object with the new path:

File f2 = new File("C:\\foo\\foo\\newname")

Does it make any side effect on your code?