Exam 13: File Input and Output

Permanent storage is usually called computer memory or random access memory (RAM).

InputStream and OutputStream are subclasses of the ____ class.

The value you store in memory is lost when the program ends or the computer loses power. This type of storage device is called ____.

Describe and provide an example of the differences between real-time applications and interactive programs.

When a String is written, placing each record on a new line makes the output file easier to read and interpret. Since not all platforms use '\n' to separate lines, the BufferedWriter class has two alternatives: the newLine() method and the System.getProperty() method. Describe these two methods and how they operate.

import java.nio.file.*; import java.io.*; import static java.nio.file.StandardOpenOption.*; public class WriteFile {    public static void main(String[] args)    {       Path myFile = Paths.get("C:\\Java\\Input.Output\\myNumbers.txt");       String nums = "12345";       byte[] data = nums.getBytes();       OutputStream output = null;       try      {        -----Code here------        output.write(data)        output.flush();        output.close();      }      catch(Exception badNums)      {          System.out.println("My numbers: " + badNums);      }   } } Using the above code, add a statement on the indicated line that will create a writeable file by constructing a BufferedOutputStream object and assigning it to the OutputStream . No output should appear on the monitor, but a file should be created.

How can you categorize files by the way they store data?

In random access files, records can be retrieved in any order.

FileSystems is a class that contains ____ methods, which assist in object creation.

When you perform input and output operations in an application, what is actually occurring with the bytes of information?

The ____ method returns the last Path element in a list of pathnames.

import java.util.Scanner; import java.nio.file.*; public class PathDemo2 {     public static void main(String[] args)     {        String name;        Scanner keyboard = new Scanner(System.in);        System.out.print("Enter a file name >> ");        name = keyboard.nextLine();        Path inputPath = Paths.get(name);        ------- Code here -----        System.out.println("Full path is " + fullPath.toString());     } } Using the above code, add a statement on the indicated line that creates an absolute path by assigning the file to the current directory.

import java.nio.file.*; import static java.nio.file.AccessMode.*; import java.io.IOException; public class PathDemo3 {   public static void main(String[] args)   {     Path myFile = Paths.get("C:\\Java\\Chapter.13\\Data.txt");     System.out.println("Path is " + myFile.toString());     try     {       -------------- Code here -------------------       System.out.println("File can be read and executed");     }     catch(IOException e)     {        System.out.println("File cannot be used for this application");     }    } } Assuming you have declared a path named myFile , create the checkAccess() method on the indicated line that will verify that the file exists, and checks that the program can read and write to the file.

When you use the BufferedReader class, you must import the java.io package into your program.

Placing a file in the ____ directory of your storage device is equivalent to tossing a loose document into a drawer.

The top-level element in a Path 's directory structure is located at index 1.