BIG JAVA: LATE OBJECTS
BIG JAVA: LATE OBJECTS
2nd Edition
ISBN: 9781119626220
Author: Horstmann
Publisher: WILEY
Expert Solution & Answer
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Chapter 7, Problem 1RE

Explanation of Solution

Action happened when the user tries to open a file for reading that doesn’t exist:

  • A “FileNotFoundException” would be thrown if the file could not be opened because, there is already a folder named which was given by the user.
    • This exception can be thrown when an application tries to open a file for writing, but that file only for read, or the permissions of the file don’t allow the file to be read by any application.

Therefore, Java will throw a “FileNotFoundException” when the user opens a file for reading which doesn’t exist.

Explanation of Solution

Action happened when the user tries to open a file for writing that doesn’t exist:

  • The “PrintWriter” class helps to create the object for “PrintWriter” for text file creation and data can be written into that text file.
  • If the output file already exists, it is emptied before the new data are written into it.

Therefore, Java will create a new empty file when the user opens a file for writing which doesn’t exist.

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Students have asked these similar questions
Need help answering these questions!1. Design a While loop that lets the user enter a number. The number should be multiplied by 10, and the result stored in a variable named product. The loop should iterate as long as the product contains a value less than 100.   2. Design a For loop that displays the following set of numbers: 0, 10, 20, 30, 40, 50 . . . 1000   3. Convert the While loop in the following code to a Do-While loop:     Declare Integer x = 1     While x > 0        Display "Enter a number."        Input x     End While
Need help with these:Design a While loop that lets the user enter a number. The number should be multiplied by 10, and the result stored in a variable named product. The loop should iterate as long as the product contains a value less than 100.   2. Design a For loop that displays the following set of numbers: 0, 10, 20, 30, 40, 50 . . . 1000   3. Convert the While loop in the following code to a Do-While loop:     Declare Integer x = 1     While x > 0        Display "Enter a number."        Input x     End While
Convert the While loop in the following code to a Do-While loop:    Declare Integer x = 1    While x > 0       Display "Enter a number."       Input x    End While
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