question: public static void moveFile ( File srcFile , File destFile ) throws IOException { if ( srcFile == null ) { throw new NullPointerException ( "Source must not be null" ) ; } if ( destFile == null ) { throw new NullPointerException ( "Destination must not be null" ) ; } if ( ! srcFile . exists ( ) ) { throw new FileNotFoundException ( "Source '" + srcFile + "' does not exist" ) ; } if ( srcFile . isDirectory ( ) ) { throw new IOException ( "Source '" + srcFile + "' is a directory" ) ; } if ( destFile . exists ( ) ) { throw new FileExistsException ( "Destination '" + destFile + "' already exists" ) ; } if ( destFile . isDirectory ( ) ) { throw new IOException ( "Destination '" + destFile + "' is a directory" ) ; } boolean rename = srcFile . renameTo ( destFile ) ; if ( ! rename ) { copyFile ( srcFile , destFile ) ; if ( ! srcFile . delete ( ) ) { FileUtils . deleteQuietly ( destFile ) ; throw new IOException ( "Failed to delete original file '" + srcFile + "' after copy to '" + destFile + "'" ) ; } } }
target:  Moves a file. <p/> When the destination file is on another file system, do a "copy and delete".