Write a program that replaces all occurrences of a word with anew word in all the files under a directory, recursively. Pass the parameters fromthe command line as follows:java Exercise18_31 dirName oldWord newWord
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Write a
new word in all the files under a directory, recursively. Pass the parameters from
the command line as follows:
java Exercise18_31 dirName oldWord newWord
Step by step
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- Create a recursive function in a file called ab_equality.py: def ab_equal(n, k, current): Print out all of the strings of a's and b's of length n so that the number of a's and b's are equal. For n = 2, there's ab and ba. For n = 3 there are no strings since they'd have to have 2 a's and 1 b, or 2 b's a 1 a so not equal. For n = 4, there will be 6 of these strings, and for n = 5, zero again. Hint: use k to track the difference between a's and b's. So for instance if your current is aaabb then k should be equal to either 1 or -1 (your choice depending). When you call the function, you should call it from your main or testing function with the length in the n parameter, 0 should be put into the k parameter, and then an empty string will be passed in for current.Create a Java program. You have a list of Student ID's followed by the course number(separated by aa space) that the student is enrolled in. The listing is in no particular order. For eg. is student 1 is in CS100 and CS200 while student 2 is in CS105 and MATH210 then the list may look like this: 1 CS100 2 MATH210 2 CS105 1 CS200 Write a program that reads data in this format from the console. If the ID is -1 then stop inputting data. Use the HashMap class to map from an Integer(Student ID) to an ArrayList of type String that holds each class that the student is enrolled in. The declaration should look like this: HashMap<Integer, ArrayList<String>> students = new HashMap<Integer, ArrayList<String>>(); After all data is input, iterate through the map and output the student ID and all classes stored in the vector for that student. The result should be a list of classes organized by student id.IN JAVA Create a function that takes a string and returns the number of alphanumeric characters that occur more than once. Examples duplicateCount ("abcde") → 0 duplicateCount ("aabbcde") → 2 duplicateCount ("Indivisibilities") → 2 duplicateCount ("Aa") → 0 // Case sensitive
- Make a telephone lookup program. Read a data set of 1,000 names and telephone numbers from a file that contains the numbers in random order. Handle lookups by name and also reverse lookups by phone number. Use a binary search for both lookups. This assignment needs a resource class and a driver class. The resource class and the driver class will be in two separate files. The resource class will contain all of the methods and the driver class only needs to call the methods. The driver class needs to have only 5 lines of code. The code needs to be written in Java. Please help me with exactly what I asked for help.Develop a program that will do the following using Java and Javaclasses of Filewriter and Arraylist: The program has the interface[A] Add[D] Delete[U] Update[S] Search[X] Exit Select Operation: A You are about to add a user. Enter the First name:Enter the Last name:Enter the username:Enter password: The user has been successfully added. Do you wish to do another operation? [Y/N]: Y ---------------------------------------------------------------------------------------------- [A] Add[U] Update[S] Search[D] Delete[X] Exit Select Operation: U You are about to update user information. Search ID: 3 User information:First name: GeraldLast name: MorenoUsername: igeraldPassword: egerald Enter new username: asxsEnter new password: erdasdfr Username and Password have been updated successfully. Do you wish to do another operation? [Y/N]: Y ---------------------------------------------------------------------------------------------------------- [A] Add[U] Update[S] Search[D] Delete[X] Exit Select…A java file that reads a text file, in.txt, that contains a list of positive integers a positive integer) separated by spaces and/or line breaks. After reading the integers, the program must recursively figure out if the list of integers includes two equal integers. If the list includes two equal integers, the program prints out Yes. Otherwise, the program prints out No. Assume that in.txt contains at least 2 integers. It is important that your program be named Two and that the input file is named in.txt.
- Write a JAVA program to read in a list of electric vehicles. Print out the vehicle with the longest range. Data is stored in the following format: <automobile name><newline><list price><space><range> Here is a sample datafile. File: cars.txt Ford Focus Electric 32103 185 Nissan Leaf S 36398 241 Tesla Model S 97600 536 Kia Soul EV 35895 179 The following is a sample run, user input is shown in bold underline: Enter the input filename: c:/temp/cars.txt Car with the longest range = Tesla Model S Price $97600.00 Range = 536Write a program called Recursive_fibonacci.java that implements a recursive function for computing the nth term of a Fibonacci Sequence. In the main method of your program accept the value of n from the user as a command-line argument and then call your function named Fibonacci with this value. The output should look exactly like what is pictured below.An “inverted file” is a critical data structure for implementing applications like the index of a book, or a web search engine. Given a document D (which can be viewed as an unordered, numbered list of words), an inverted file is an ordered list of words L such that for each word W in L, we store the indices of the places in D where W appears. Write a C# program (from scratch please, written by yourself (ask instructor if you are stuck), not borrowed from any other sources) that reads in a list of words separated by spaces from a text file, then uses an efficient O(N) algorithm to create the inverted file index (hint: consider the topic of this chapter, consider using a Dictionary/hashtable to help you), and writes this index out to another file or prints it to the screen. Each line of the output file should start with the next word (the words should be listed in alphabetical order, and this sorting does not have to be part of the O(N) runtime complexity, e.g. you can use regular…
- Develop a program in Java to maintain a list of homework assignments. When an assignment is assigned, add it to the list, and when it is completed, remove it. You should keep track of the due date. Your program should provide the following services: 1. Add a new assignment. 2. Remove an assignment. 3. Provide a list of the assignments in the order they were assigned. 4. Find the assignment(s) with the earliest due date.create a recursive decent parse that read ( 1 + 2 ) / 3 from a txt file import java.io.File;import java.io.FileNotFoundException;import java.util.Scanner;import java.util.StringTokenizer; public class Lexical {public static void main(String args[]) throws FileNotFoundException{//reading file (Create one and put the expression (2+5/t) or (1-9)*0)Scanner input = new Scanner(new File("Expression.txt"));while(input.hasNextLine()) {//reading next lineString line = input.nextLine();//reading tokens by spaceStringTokenizer strings = new StringTokenizer(line," ");//reading more stringswhile (strings.hasMoreElements()) {//converting object to stringString token = strings.nextElement().toString();switch(token) //switch case{case "(" :System.out.println("Next token is: 25 Next lexeme is (");break;case ")" :System.out.println("Next token is: 26 Next lexeme is )");break;case "=" :System.out.println("Next token is: 20 Next lexeme is =");break;case "+" :System.out.println("Next token is: 21 Next…Write a Java Program named EmployeeRecords that simulates a company's HR system. Theprogram reads a list of employee ids, names, and salaries from a file a3q1.txt, and stores theinformation in parallel array lists ids, names, and salaries.Sample input (a3q1.txt)132 Dumbledore 90000465 Lupin 60000443 McGonagall 75000124 Snape 70000337 Sprout 62000 retrieveEmployeeRecord(...) that accepts the array list of employee IDs and anemployee ID to find, and returns the index of the entry.●reportBySalary(...) that accepts all 3 of the array lists and a minimum salary, anddisplays the list of employees that meet the criteria.Sample output 1:Make a selection:[A] Retrieve employee information[B] Display report by salaryAEnter the employee number:465Name: LupinSalary: 60000end of programSample output 2:Make a selection:[A] Retrieve employee information[B] Display report by salaryBEnter the minimum salary:70000Employees with salary of 70000 or higher:132 Dumbledore, Salary: 90000443 McGonagall,…