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In the Unix'esque O/S's you cannot renameTo() across file systems. This behavior is different than the Unix "mv" command. When crossing file systems mv does a copy and delete which is what you'll have to do if this is the case.
The same thing would happen on Windows if you tried to renameTo a different drive, i.e. C: -> D:
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File sourceFile = new File("c:/test.txt");   
File targetFile1 = new File("e:/test.txt");   
File targetFile2 = new File("d:/test.txt");   
System.out.println("source file is exist? " + sourceFile.exists()   
    + ", source file => " + sourceFile);   
System.out.println(targetFile1 + " is exist? " + targetFile1.exists());   
System.out.println("rename to " + targetFile1 + " => "  
    + sourceFile.renameTo(targetFile1));   
System.out.pr


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