Introduction to Java Programming and Data Structures, Comprehensive Version Plus MyProgrammingLab with Pearson EText -- Access Card Package
11th Edition
ISBN: 9780134694511
Author: Liang, Y. Daniel
Publisher: Pearson Education Canada
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Textbook Question
Chapter 17.4, Problem 17.4.6CP
How do you append data to an existing text file using java.io.PrintWriter?
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I have this homework where I have to search a word in a file and count how many words in and how long takes to find it. My code working well but counts the empty lines as words and I don't want the empty lines to be counted . would you look at it and see what I can add to it so the code will not count the empty lines in the file.
Here the code
import java.io.File;import java.io.FileNotFoundException;//scanner class for user inputimport java.util.Scanner;public class Uppgift2 {//main functionpublic static void main(String[] args) {//string to store input file nameString input_file;//check if argument is passed in command lineif (args.length == 0) {//if arg. is not passed initialise file to wordlist1.txtinput_file = "wordlist1.txt";} else {//else store the argumentinput_file = args[0];}try {//opening file in read modeFile fp = new File(input_file);//scanner object for input fileScanner scan = new Scanner(fp);//scanner object to take word inputScanner search = new…
In Java:
We had a file named abc.txt and we want to change it's name to xyz.txt and you have to write java code for that
Chapter 17 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version Plus MyProgrammingLab with Pearson EText -- Access Card Package
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...
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