Write a program that replaces each line of a file with its reverse. For example, if you run java Reverse HelloPrinter.java then the contents of HelloPrinter.java are changed to retnirPolleH ssalc cilbup { )sgra ][gnirtS(niam diov citats cilbup { wodniw elosnoc eht ni gniteerg a yalpsiD //

Write a program that replaces each line of a file with its reverse. For example, if you run java Reverse HelloPrinter.java then the contents of HelloPrinter.java are changed to retnirPolleH ssalc cilbup { )sgra ][gnirtS(niam diov citats cilbup { wodniw elosnoc eht ni gniteerg a yalpsiD //

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write a python program that prompts the user for their favorite basketball team. It should be able to read the list of teams provided below in a file called favorite_teams.txt and check if their team is in that file. Teams in the file:JazzBullsMavericksSpursIf the team is in the file let the user know that their team is in the list of favorites. If the team is not in the file, add the team to the end of the file. Also, let the user know that their team will be added to the file.Sample Run in File:What is your favorite NBA team? Jazz [Enter]Your team Jazz is in the listFile before and after run: JazzBullsMavericksSpurs Sample Run not in File:What is your favorite NBA team? Pelicans [Enter]Your team Pelicans is not in the list. It will be added.File before run: JazzBullsMavericksSpursFile after run:JazzBullsMavericksSpursPelicans
Write a Java program that reads from a URL and searches for a given word in the URL and creates a statistic file as an output. The statistic file needs to include some information from the URL. URL address Number of words in the URL page Number of repetitions for a given word displays the number of times the word appears. You need to have two functions, one for reading from the URL and the other function for searching the word.
in java Variables bananaStream and bananaDataFS are FileOutputStream and PrintWriter, respectively. String bananaDataName is assigned a file's name read from input. Perform the following tasks: Assign bananaStream with a new FileOutputStream that opens bananaDataName for writing. Assign bananaDataFS with a new PrintWriter created using bananaStream. Ex: If the input is note.txt Ina, then note.txt contains: Ina ordered bananas 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 public class BananaDataProcessor { publicstaticvoidmain(String[] args) throwsIOException { Scannerscnr=newScanner(System.in); StringbananaDataName; StringbananaPurchase; FileOutputStreambananaStream=null; PrintWriterbananaDataFS=null; bananaDataName=scnr.next(); /* Your code goes here */ bananaPurchase=scnr.next(); bananaDataFS.println(bananaPurchase+" ordered bananas"); bananaDataFS.close(); } }
Java Your program must read a file called personin.txt. Each line of the file will be a person's name, the time they arrived at the professor's office, and the amount of time they want to meet with the professor. These entries will be sorted by the time the person arrived. Your program must then print out a schedule for the day, printing each person's arrival, and printing when each person goes in to meet with the professor. You need to print the events in order of the time they happen. In other words, your output will be sorted by the arrival times and the times the person goes into the professor's office. In your output you need to print out a schedule. In the schedule, new students go to the end of the line. Whenever the professor is free, the professor will either meet with the first person in line, or meet with the first person in line if nobody is waiting. Assume no two people arrive at the same time. You should solve this problem using a stack and a queue. You can only…
In java Browse Project Gutenberg (https://www.gutenberg.org/) for plain text versions of one or more works of literature of your choosing. Write a program that repeatedly searches a file for a target word or phrase.• Allow the user to supply the name of the file to search by means of a command-line argument; if the user does not supply a command line argument, ask for a file name interactively.• You may use either an array or an ArrayList to store each line in the file; but if you use an array, you’ll have to determine the array size (number of lines) before allocating the array. There are several ways to do this.• Report how many lines were read from the file.• Search for either individual words or phrases (Hint: use the .contains method, it’ll work for either a word or a phrase)• Show both the line number and the line itself for each line that contains the search target entered by the user (you may count the first line in the file as line 0).• If a search word is part of a larger…
Write a program that obtains the executiontime of external sorts for integers of size 6,000,000, 12,000,000, 18,000,000,24,000,000, 30,000,000, and 36,000,000. Your program should print a tablelike this:
Time remaining: 00:09:10 Computer Science this file is named HW3.Java can someone run it through a GNU compiler and please show me the outputs import java.io.FileWriter;import java.io.IOException;public class HW3 {public static void main(String[] args) throws IOException {// 0th argument contains the name of algorithmString algo = args[0];// 1st argument contains the name of file// Make a new fileFileWriter fw = new FileWriter(args[1]);if (algo.equals("p1")) {// 2nd argument comes in the form of string.// convert it to intger and run a loopfor (int i = 1; i <= Integer.parseInt(args[2]); i++) {double[] x = new double[(int) Math.pow(10, i)];// use start and end for recording timelong start = System.currentTimeMillis();prefixAverage1(x);long end = System.currentTimeMillis();double totalTime = Math.log10(end - start);fw.write(String.valueOf(totalTime));String newLine = System.getProperty("line.separator");fw.write(newLine);}} else if (algo.equals("p2")) {for (int i = 1; i <=…
One common use of a hash table is to build a glossary, or dictionary, of terms.In this section, we demonstrate one way to use a hash table for just such ause—a computer terms glossary.The program works by first reading in a set of terms and definitions from atext file. This process is coded in the BuildGlossary subroutine. The structureof the text file is: word,definition, with the comma being the delimiter betweena word and the definition. Each word in this glossary is a single word, but theglossary could easily work with phrases instead. That’s why a comma is usedas the delimiter, rather than a space. Also, this structure allows us to use theword as the key, which is the proper way to build this hash table.Another subroutine, DisplayWords, displays the words in a list box so theuser can pick one to get a definition. Since the words are the keys, we can usethe Keys method to return just the words from the hash table. The user canthen see which words have definitions.To retrieve a…
Question 2 Write a program in C that stores 1000 random integers (100 – 1000), one on each line, in a file named "numbers2.txt". Then using shell pipes with "cat" and "grep" commands, find lines that contain numbers between 200 and 299. Hint: use regular expressions and search for lines beginning with 2. Sample Run: $ ./question2 $ cat [...] | grep [...] 258 244 ...
Here is the code i am working with, around the last line it says what i need to do, any help please! import java.util.*; import java.io.*; public class FileLoader implements Getter { String [][] data; String [] head; String FILENAME = "wv-covid-daily.csv"; String DELIMITER = ","; int MAX_ROW; int MAX_COL; int dataRows; boolean stillLoading; public FileLoader () { MAX_ROW = 100; MAX_COL = 50; dataRows = 0; data = new String[MAX_ROW][MAX_COL]; head = new String[MAX_COL]; stillLoading = false; } public int getNumRows() { return dataRows; } public String [] getRow (int row) { return data[row]; } public boolean isLoading () { return stillLoading; } public void run () { stillLoading = true; dataRows = 0; try { String line; int row = 0; BufferedReader reader = new BufferedReader(new FileReader(FILENAME)); if((line=reader.readLine())!=null){ String fields[] = line.split(DELIMITER); head=fields; } while((line=reader.readLine())!=null){ String fields[] = line.split(DELIMITER);…
write program code in java: Write a program that reads two files “Data1.txt”, “Data2.txt”; Then add their corresponding elements and produce an output file “output.txt”. If the number of elements are not equal, fill the elements of the smaller file up with “0” s. Sample output: Elements of the “Data1.txt”: 3 5 7 8 9 Elements of the “Data2.txt”: 45 11 Elements of the “Output.txt”: 48 16 7 8