Exam 13: File Input and Output

A ____ is a group of characters that has some meaning.

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

Which of the following statements will write a line separator?

An array of bytes can be wrapped, or encompassed, into a ByteBuffer using the ByteBuffer ____ method.

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

import java.nio.file.*; import java.io.*; public class ReadEmployeeFile { public static void main(String[] args) { Path file = Paths.get("C: \\Java\\Chapter.13\\Employees.txt"); String s = ""; try { InputStream input = new BufferedInputStream(Files.newInputStream(file)); BufferedReader reader = new BufferedReader(new InputStreamReader(input)); __________________________ while(s != null) { System.out.println(s); ____________________________ } reader.close(); } catch(Exception e) { System.out.println("Message: " + e); } } } The above code represents a program that reads an Employees text file. An InputStream is declared for the file, and a BufferedReader is created using the InputStream. In the blank lines provided, write a statement that will read the first line into the String. Likewise, in the while statement, write the statement to display the String and read a new line as long as the readLine() method does not return a null value.

You can store data in variables within a program, but this type of storage is temporary.

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

writer.write(names, 0, names.length()); The above code represents a write() method of the BufferedWriter class. Describe the purpose of the method and how it accepts the String characters.

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

Because the backslash character starts the escape sequence in Java, you must use two ____ in a string that describes a Path in the DOS operating system.

A(n) ____ field is the field in a record that makes the record unique from all others.

InputStream is a child of FileInputStream.

import java.nio.file.*; import java.nio.file.attribute.*; import java.io.IOException; public class PathDemo5 { public static void main(String[] args) { Path myPath = Paths.get("C: \\Java\\Input.Output\\MyData.txt"); try { _______________________________________ System.out.println("Creation time " + attr.creationTime()); System.out.println("Last modified time " + attr.lastModifiedTime()); System.out.println("Size " + attr.size()); } catch(IOException e) { System.out.println("IO Exception"); } } } Using the above code, create a statement in the blank line provided that uses the readAttributes() method of the Files class that takes two arguments-the Path object created in the code and a BasicFileAttributes.class-and returns an instance of the BasicFileAttributes class named attr.

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

You can use Java's ____ class to create your own random access files.

You can create a writeable file by using the Files class ____ method.

The String class ____ method accepts an argument that identifies the field delimiter and returns an array of Strings.

Match each term with the correct statement below. -Functions as a pipeline or channel between a Java program and an input device

Random files are also called ____________________ files.