Exam 7: Inputoutput and Exception Handling

Your program must read in an existing text file. You want the program to terminate if any exception related to the file occurs. Which of the following indicates the correct code for the main method?

Which method of the JFileChooser object will return the file object that describes the file chosen by the user at runtime?

Insert the missing code in the following code fragment. This fragment is intended to read an input file. Public static void main(String[] args) throws FileNotFoundException { String inputFileName = "dataIn.txt"; String outputFileName = "dataOut.txt"; File inputFile = new File(inputFileName); Scanner in = _______________; ) . . }

In the hierarchy of Exception classes, the NumberFormatException class is a subclass of the ____ class.

Consider the following code snippet: Scanner in = new Scanner(. . .); ) . . If (in.hasNext()) { Throw new IOException("End of file expected"); } Which of the following statements about this code is correct?

Which method of an exception object will provide information about the chain of method calls that led to the exception?

Consider the following code snippet: PrintWriter out = new PrintWriter("output.txt"); Which of the following statements about the PrintWriter object is correct?

Consider the following code snippet: Throw IllegalStateException("This operation is not allowed!"); Which of the following statements about this code is correct?

Insert the missing code in the following code fragment. This fragment is intended to read an input file named dataIn.txt and write to an output file named dataOut.txt. Public static void main(String[] args) throws FileNotFoundException { String inputFileName = "dataIn.txt"; String outputFileName = "dataOut.txt"; File inputFile = new File(inputFileName); Scanner in = _________; ) . . }

Consider the following code snippet: Try { PrintWriter outFile = new PrintWriter(filename); WriteData(outputFile); } Catch (IOException exception) { ) . . } Finally { OutputFile.close(); } What is wrong with this code?

Consider the following code snippet: Try { File inputFile = new File(filename); Scanner in = new Scanner(inputFile); ) . . } Catch (Exception e) { } Which of the following statements about this code is correct?

Which of the following code snippets about exceptions is correct?

Consider the following code snippet: System.out.printf("%-12s%8.2f",description,totalPrice); Which of the following statements is correct?

Insert the missing code in the following code fragment. This fragment is intended to read characters from a text file. Scanner in = new Scanner(. . .); In)useDelimiter(""); While (in.hasNext()) { Char ch = ____________; System.out.println(ch); }

Consider the following code snippet: Scanner in = new Scanner(. . .); String result = ""; Int number = 0; If (in.hasNextInt()) { Number = in.nextInt(); } Result = in.next(); If the input begins with the characters 626.14 average, what values will number and result have after this code is executed?

You have opened a command prompt window and you have entered the following: Java myProg Bob Smith Which of the following statements is correct?

Consider the following code snippet: Throw new IllegalArgumentException("This operation is not allowed!"); Which of the following statements about this code is correct?

Which of the following statements reflects the textbook's recommendations about closing files?

Which method of an exception object will retrieve a description of the exception that occurred?

Insert the missing code in the following code fragment. This fragment is intended to read floating-point numbers from a text file. Scanner in = new Scanner(. . .); While (____________) { Double hoursWorked = in.nextDouble(); System.out.println(hoursWorked); }