Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 17.7, Problem 17.7.1CP
Can RandomAccessFi1e streams read and write a data file created by DataOutputStream? Can RandomAccessFile streams read and write objects?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Suppose that a binary file contains exactly three numbers written to the file using the method writeDouble of the class ObjectOutputStream. Suppose further that you write a program to read all three numbers using three invocations of the method readDouble of the class ObjectInputStream. If your program invokes readDouble a fourth time, what will happen?
Which is true?
a.
The FileOutputStream class includes println( )
b.
A PrintWriter object should be closed using close( )
c.
A PrintWriter constructor requires an OutputStream object
d.
A FileOutputStream object opens an existing file
JAVA
Does the class FileOutputStream have a constructor that accepts a filename as an argument?
Chapter 17 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 17.2 - What is a text file and what is a binary file? Can...Ch. 17.2 - How do you read or write text data in Java? What...Ch. 17.3 - Prob. 17.3.1CPCh. 17.3 - How is a Java character represented in the memory,...Ch. 17.3 - If you write the string ABC to an ASCII text file,...Ch. 17.3 - If you write the string 100 to an ASCII text file,...Ch. 17.3 - What is the encoding scheme for representing a...Ch. 17.4 - Prob. 17.4.1CPCh. 17.4 - Why should you always close streams? How do you...Ch. 17.4 - Prob. 17.4.3CP
Ch. 17.4 - Does FileInputStream/Fi1eOutputStream introduce...Ch. 17.4 - What will happen if you attempt to create an input...Ch. 17.4 - How do you append data to an existing text file...Ch. 17.4 - Prob. 17.4.7CPCh. 17.4 - What is written to a file using writeByte(91) on a...Ch. 17.4 - How do you check the end of a file in an input...Ch. 17.4 - What is wrong in the following code? Import...Ch. 17.4 - Suppose you run the following program on Windows...Ch. 17.4 - After the following program is finished, how many...Ch. 17.4 - For each of the following statements on a...Ch. 17.4 - What are the advantages of using buffered streams?...Ch. 17.5 - How does the program check if a file already...Ch. 17.5 - How does the program detect the end of the file...Ch. 17.5 - How does the program count the number of bytes...Ch. 17.6 - Prob. 17.6.1CPCh. 17.6 - Prob. 17.6.2CPCh. 17.6 - Is it true that any instance of...Ch. 17.6 - Prob. 17.6.4CPCh. 17.6 - Prob. 17.6.5CPCh. 17.6 - What will happen when you attempt to run the...Ch. 17.7 - Can RandomAccessFi1e streams read and write a data...Ch. 17.7 - Create a RandomAccessFi1e stream for the file...Ch. 17.7 - What happens if the file test.dat does not exist...Ch. 17 - (Create a text file) Write a program to create a...Ch. 17 - (Create a binary data file) Write a program to...Ch. 17 - (Sum all the integers in a binary data file)...Ch. 17 - (Convert a text file into UTF) Write a program...Ch. 17 - Prob. 17.5PECh. 17 - Prob. 17.6PECh. 17 - Prob. 17.7PECh. 17 - (Update count) Suppose that you wish to track how...Ch. 17 - (Address book) Write a program that stores,...Ch. 17 - (Split files) Suppose you want to back up a huge...Ch. 17 - (Split files GUI) Rewrite Exercise 17.10 with a...Ch. 17 - Prob. 17.12PECh. 17 - (Combine files GUI) Rewrite Exercise 17.12 with a...Ch. 17 - (Encrypt files) Encode the file by adding 5 to...Ch. 17 - (Decrypt files) Suppose a file is encrypted using...Ch. 17 - (Frequency of characters) Write a program that...Ch. 17 - (BitOutputStream) Implement a class named...Ch. 17 - (View bits) Write the following method that...Ch. 17 - (View hex) Write a program that prompts the user...Ch. 17 - (Hex editor) Write a GUI application that lets the...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
If the period of a pulse waveform increases, the frequency also increases.
Digital Fundamentals (11th Edition)
Assume as known that the Vandermonde determinant V=|11...1r1r2...r3r12r22...rn2r1n1r2n1...rnn1| is nonzero if t...
Differential Equations: Computing and Modeling (5th Edition), Edwards, Penney & Calvis
The following program skeleton determines whether a person qualifies for a credit card. To qualify, the person ...
Starting Out with C++ from Control Structures to Objects (9th Edition)
Give an example of each of the following, other than those described in this chapter, and clearly explain why y...
Modern Database Management (12th Edition)
Which file open flag causes all output to take place at the end of the file?
Starting Out with C++: Early Objects (9th Edition)
Consider the following C program void fun (void) { int a, b, c; / defiinition.1 / . . . while (. . .) int b, c,...
Concepts of Programming Languages (11th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Assume the size of the file.txt below is 100 GB. Is there anything wrong with the following Spark code? Is there anything wrong with this code? How can it be fixed? from collections import defaultdict text_file = sc.textFile("file.txt") counts = text_file.flatMap(lambda line: line.split(" ")).map(lambda word: (word, 1)).collect() key_val = defaultdict(int) for item in counts: key = item[0] val = item[1] key_val[key] += int(val) filtered_key_val = dict() for k, v in key_val.items(): if v >= 100: filtered_key_val[k] = v return filtered_key_valarrow_forwardYou would use a stream's clear method to: Multiple answers: Multiple answers are accepted for this question a empty the output buffer b reset flags after a failed translation/extraction c clear the screen d clean up after a bad file open attempt e forget an end-of-file encounter before seeking back to the beginning of the streamarrow_forwardcan someone check why my code is not working? intergers.txt 4 7 2 5 3 #include <iostream>#include <fstream>using namespace std; int main(){int num[100],i=-1; // variable declaration to read the integer data char tx;//variable declared ifstream myFile; // input file declaration myFile.open("numbers.txt"); // Syntax for open the file and read integer.txt while (!(myFile.eof())){ myFile >> num[i]; i++; // read the integer content from the file //myFile>>tx; // read the comma}num[i] = num[i+1]; // Delete the last garbage valuecout<<"The elements in the array are "; for(int j=0;j<i;j++){ // Loop to run for all the elements in the array if(j==i-1) cout<<num[j]<<endl; // print element with new line else cout<<num[j]<<","; // print the array} myFile.close(); //close the filereturn 0;}arrow_forward
- PrintWriter and Scanner - text file I/O DataInputStream and DataOutputStream - binary file I/O RandomAccessFile - binary file i/o where every record is the same number of bytes so that you can seek to a specific record ObjectInputStream and ObjectOutputStream - read and write objects.arrow_forwardWrite a complete program that uses an ifstream object to read integers from a file called numbers.txt, and an ofstream to write into a file called doubles.txtYour program should have a loop that reads five integers from the input file, then writes the doouble of each (x2) into the input file. Write each value in a separate line.Make sure to close both files before your program terminates.arrow_forward1. Create a program that writes an Integer object to a stream and reads this object from the stream. 2. Simple Encryption. Read from a file specified by the user and encrypt the content of the file using a simple shifting technique. Also, ask the user to input the shift size. Output the encrypted message to another file whose filename is also provided by the user. For example, Shift size: 1 Message read from the file: Hello Encrypted message: Ifmmparrow_forward
- Assume inputFile references a StreamReader object that is associated with an open file. Which of the following loops is written in the correct general format to read all of the items from the file? Loop A: while (inputFile.EndOfStream) { // Read an item from the file. } Loop B: while (!inputFile.EndOfStream) { // Read an item from the file. }arrow_forwardDescribe the advantages of using a FileInputStream over a FileReader when dealing with binary data.arrow_forwardWrite a complete program that uses an ifstream object to read integers from a file called numbers.txt, and an ofstream object to write into a file called evens.txt.Your program should have loop that reads each integer from the input file, then writes it into the output file if it is an even number. Write each even number in na separate line.Make sure to close both files before your program terminates.arrow_forward
- JAVA CODE can only be added inbetween lins of grey code. Like in the image 10-13 lines Perform the following tasks: Declare a FileInputStream named gradeFStream, and a Scanner named gradeFileFS. Read string dataFileName from input. Assign gradeFStream with a FileInputStream that opens the file dataFileName for reading. Assign gradeFileFS with a Scanner created using gradeFStream. Ex: If the input is grade3.txt and: Contents of file grade3.txt F then the output is: F grade1.txt Line 1 D grade2.txt Line 1 A grade3.txt Line 1 Farrow_forwardin java' Variables fStream and dataFS are FileInputStream and Scanner, respectively. String fileName is assigned a file's name read from input. Perform the following tasks: Assign fStream with a FileInputStream that opens the file fileName for reading. Assign dataFS with a Scanner created using fStream. Click here for example Ex: If the input is peach2.txt and: Data in file peach2.txt 4.3 then the output is: 4.3 GroceryDataProcessor.java peach1.txt peach2.txt peach3.txt public class GroceryDataProcessor { publicstaticvoidmain(String[] args) throwsIOException { Scannerscnr=newScanner(System.in); StringfileName; doublepeachWeight; FileInputStreamfStream=null; ScannerdataFS=null; fileName=scnr.next(); /* Your code goes here */ peachWeight=dataFS.nextDouble(); System.out.println(peachWeight); fStream.close(); } }arrow_forwardIN JAVA Which XXX allows information to be written to a file using print( )? FileOutputStream foStream = null; PrintWriter outFS = null; foStream = new FileOutputStream("outfile.txt");XXXoutFS.println("Java is my favorite language!"); A. outFS = new PrintWriter("outfile.txt"); B. new PrintWriter(foStream); C. outFS = PrintWriter.open(foStream); D. outFS = new PrintWriter(foStream);arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Microsoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
Microsoft Visual C#
Computer Science
ISBN:9781337102100
Author:Joyce, Farrell.
Publisher:Cengage Learning,
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT
Files & File Systems: Crash Course Computer Science #20; Author: CrashCourse;https://www.youtube.com/watch?v=KN8YgJnShPM;License: Standard YouTube License, CC-BY
UNIX Programming (Part - 10) The File System (Directories and Files Names); Author: ITUTEES;https://www.youtube.com/watch?v=K35faWBhzrw;License: Standard Youtube License