IO

1. If directory in which the file should be created does not exist, method createNewFile() throws IOException.

        try {
            File f = new File("test", "test.txt");
            f.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
----------------------------------------------------------------------------------------------------------

2. Method renameTo accepts only File objects not String!

Prototype of the method:
public boolean renameTo(File dest)
----------------------------------------------------------------------------------------------------------

3.  If there is no directory structure, PrintWriter throws FileNotFoundException.


    try {
        PrintWriter pw = new PrintWriter("test/test/test.xml");
    }catch(FileNotFoundException e) {
        e.printStackTrace();
    }


  when the directory structure exists, the physical file is created by PrintWriter


    try {
        PrintWriter pw = new PrintWriter("test.xml");
    }catch(FileNotFoundException e) {
        e.printStackTrace();
    }
----------------------------------------------------------------------------------------------------------
4. flush() method is only available in writers: FileWriter, BufferedFileWriter, PrintWriter.
    flush() method is not available in readers.