renameTo() not work in eclipse Helios

Question

This is a simple class to show 4 cases. Sorry for my english (is bad)

public static void main(String[] args) throws IOException {

    //TODO De temporal a archivo en directorio
    //TODO from file in temporary folder to file in common folder.
    File fromTemp_Dir = File.createTempFile("Temp_Dir_FROM", ".temp");
    File toTemp_Dir = new File ("Temp_Dir");        

    BufferedWriter bufferWriterTemp_DirFROM = new BufferedWriter(new FileWriter(fromTemp_Dir));
    bufferWriterTemp_DirFROM.write("Temp_Dir_FROM");
    bufferWriterTemp_DirFROM.close();

    BufferedWriter bufferWriterTemp_DirTO = new BufferedWriter(new FileWriter(toTemp_Dir));
    bufferWriterTemp_DirTO.write("Temp_Dir_TO");
    bufferWriterTemp_DirTO.close();

    System.out.println("fromTemp_Dir exist? "+fromTemp_Dir.exists());
    System.out.println("toTemp_Dir exist? "+toTemp_Dir.exists());


    toTemp_Dir.delete();
    if (!fromTemp_Dir.renameTo(toTemp_Dir)){
        System.out.println("rename fail 'De temporal a archivo en directorio'");
    }else {
        System.out.println("Rename successful 'De temporal a archivo en directorio'");
    } 


    //TODO De archivo a temporal
    //TODO from file in common folder to file in temporary folder.
    File fromDir_Temp = new File ("Dir_FROM");
    File toDir_Temp = File.createTempFile("Dir_Temp_TO", ".temp");

    BufferedWriter bufferWriterDir_TempFROM = new BufferedWriter(new FileWriter(fromDir_Temp));
    bufferWriterDir_TempFROM.write("Dir_Temp_FROM");
    bufferWriterDir_TempFROM.close();

    BufferedWriter bufferWriterDir_TempTO = new BufferedWriter(new FileWriter(toDir_Temp));
    bufferWriterDir_TempTO.write("Dir_Temp_TO");
    bufferWriterDir_TempTO.close();

    toDir_Temp.delete();
    if (!fromDir_Temp.renameTo(toDir_Temp)){
        System.out.println("rename fail 'De archivo en directorio a temporal'");
    } else{
        System.out.println("rename successful 'De archivo en directorio a temporal'");
    }


    //TODO De temporal a temporal
    //TODO from temporary folder to temporary folder
    File fromTemp = File.createTempFile("archivoTempFROM_", ".temp");
    File toTemp = File.createTempFile("archivoTempTO_", ".temp");

    BufferedWriter bufferWriterFROMTemp = new BufferedWriter(new FileWriter(fromTemp));
    bufferWriterFROMTemp.write("archivoTempFROM");
    bufferWriterFROMTemp.close();

    BufferedWriter bufferWriterTOTemp = new BufferedWriter(new FileWriter(toTemp));
    bufferWriterTOTemp.write("archivoTempTO");
    bufferWriterTOTemp.close();

    toTemp.delete();
    if (!fromTemp.renameTo(toTemp)){
        System.out.println("rename fail 'De temporal a temporal'");
    }else {
        System.out.println("Rename successful 'De temporal a temporal'");
    } 

    //TODO De archivo a archivo en directorio
    //TODO from file in common directory to file in common directory 
    File fromDir = new File("archivoDirFROM");
    File toDir = new File("archivoDirTO");

    BufferedWriter bufferWriterFROMDir = new BufferedWriter(new FileWriter(fromDir));
    bufferWriterFROMDir.write("archivoDirFROM");
    bufferWriterFROMDir.close();

    BufferedWriter bufferWriterTODir = new BufferedWriter(new FileWriter(toDir));
    bufferWriterTODir.write("archivoDirTO");
    bufferWriterTODir.close();

    toDir.delete();
    if (!fromDir.renameTo(toDir)){
        System.out.println("rename fail 'De archivo a archivo en directorio'");
    }else {
        System.out.println("Rename successful 'De archivo a archivo en directorio'");
    } 

}

Show in my console

fromTemp_Dir exist? true
toTemp_Dir exist? true
rename fail 'De temporal a archivo en directorio'
rename fail 'De archivo en directorio a temporal'
Rename successful 'De temporal a temporal'
Rename successful 'De archivo a archivo en directorio'

This class works on some PCs but not in other PC (tested in 7 PCs, 5 work, 2 not work), all with ubuntu installed.

Supposedly it is a permissions problem but I have set the PC as administrator and root.

I tried with gksu and sudo, but does not work.

Any solution?

Thanks.

Possible Duplicate: http://stackoverflow.com/questions/1000183/reliable-file-renameto-alternative-on-windows — DaveJohnston, Dec 23 '11 at 12:46

score 2 · Answer 1 · answered Dec 23 '11 at 12:56

2

read the renameTo doc:

Whether or not this method can move a file from one filesystem to another is platform-dependent. The return value should always be checked to make sure that the rename operation was successful

I had somehow an issue like you do, but I had to work with a lot of files and I had the need to make pretty sure things happen. The solution was to use the OS to do that, calling Runtime.getRuntime().exec(command)

And inside command I could do a "mv" file1 file2 Sounds silly, but it did the job. Probably it is pretty expensive to do that too often, but it worked without any big problems.

Cheers, Eugene.

answered Dec 23 '11 at 12:56

Eugene

117,005
15
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This only works under linux OS but if I want to use windows OS does not work. I need to work on both Windows and Linux. – ipaddimm-75 Dec 23 '11 at 14:41
Well because Windows is.. well Windows and it uses some weird way of locking, you can't really force a rename. The file could be open, could be used by some anti-virus, some Windows Indexer, whatever and if it does you will not be able to rename it. You could implement a retry, but that is just a fancy way to run away from the problem. – Eugene Dec 23 '11 at 15:02
I have to further investigate how to solve this damn problem. thanks anyway. – ipaddimm-75 Dec 23 '11 at 17:02

score 1 · Accepted Answer · edited Dec 27 '11 at 15:54

1

Change the renameTo() method for

Files.move(new File(newFilePath), new File(oldFilePath));

this is working perfectly.

edited Dec 27 '11 at 15:54

Tom van der Woerdt

29,532
7
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answered Dec 27 '11 at 15:17

ipaddimm-75

21
4

renameTo() not work in eclipse Helios

2 Answers2