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| • A File object represents a file or a directory. • An instance of the JFileChooser class is a file dialog that lets the user select a file to read data from or save data to. • Various input and output stream classes are defined in the java.io package. • Low-level file input and output read and write data 1 byte at a time. • FileInputStream and FileOutputStream classes are used for low-level file I/O. • High-level file input and output read and write data of primitive data type. • DataInputStream and DataOutputStream classes are used for high-level file I/O. • With text I/O, data are read and saved as strings. • PrinterWriter and BufferedReader classes are used for text I/O. • The Scanner class can be used to input data from a text file. • With object I /O, data are read and saved as objects. • ObjectInputStream and ObjectOutputStream are used for object I/O. • To be able to save objects to a file, the class they belong to must implement the Serializable interface. • The standard classes described or used in this chapter are: File FileReader JFileChooser BufferedReader FileOutputStream Scanner FileInputStream Serializable DataOutputStream ObjectOutputStream DataInputStream ObjectInputStream PrintWriter |