import static org.junit.jupiter.api.Assertions.assertEquals; import java.util.Set; import static java.util.stream.Collectors.toSet; /** * In this assignment, you will implement a simple class called CustomString. This class represents a more customizable version * of a String, with additional attributes and methods. * For example, the CustomString class has a "reverse" method which returns a new string version of the current string where the * capitalization is reversed (i.e., lowercase to uppercase and uppercase to lowercase) for the alphabetical characters specified * in the given arg. For CustomString "abc, XYZ; 123.", calling reverse("bcdxyz@3210.") will return "aBC, xyz; 123.". * * The CustomString class also has a "remove" method which returns a new string version of the current string where the alphabetical * characters specified in the given arg, are removed. For CustomString "my lucky numbers are 6, 8, and 19.", calling remove("ra6") * will return "my lucky numbes e 6, 8, nd 19.". * */ public class CustomString { //instance variables /** * Current string. */ private String myString = null; /** * Indicates if the current string myString has been set (not null). */ //boolean isSet; //constructor /** * Initializes current string myString to null. * Initializes isSet to false. */ public CustomString() { //this.isSet = false; this.myString = null; } // methods /** * Returns the current string. * If the current string is null, or has not been set to a value with setString, it should return null. * @return current string */ public String getString() { return this.myString; } /** * Sets the value of the current string and sets this.isSet to true. * If the given string is null, sets this.isSet to false. * @param string value to be set */ public void setString(String string) { this.myString = string; } /** * Returns a new string version of the current string where the alphabetical characters specified in the given arg, are removed. * * The alphabetical characters to be removed are case insensitive. * All non-alphabetical characters are unaffected. * If the current string is null, empty, or has not been set to a value, this method should return an empty string. * * Example(s): * - For a current string "my lucky numbers are 6, 8, and 19.", calling remove("ra6") would return "my lucky numbes e 6, 8, nd 19." * - For a current string "my lucky numbers are 6, 8, and 19.", calling remove("6,.") would return "my lucky numbers are 6, 8, and 19." * - For a current string "my lucky numbers are 6, 8, and 19.", calling remove("") would return "my lucky numbers are 6, 8, and 19." * * Remember: This method builds and returns a new string, and does not directly modify the myString field. * * @param arg the string containing the alphabetical characters to be removed from the current string * @return new string in which the alphabetical characters specified in the arg are removed */ public String remove(String arg) {

A binary operator is an operation that is performed on two operands. For example, addition is a binary operator that adds two operands (e.g., 2 + 4). In the provided UML diagram, all binary operators have two operands and an execute method that performs the appropriate operation on the operands. The AddOperation class should add the two operands. The SubtractOperation class should subtract the two operands. Here is an example of how a binary operator could be used: IBinaryOperator operator = new AddOperator(8, 12);System.out.println(operator.execute()); // should print 20operator.setLeftOperand(18);System.out.println(operation.execute()); // should print 30 crate a Main.java to test your code

Implement the copy assignment operator= for the StringVar class using the options given on the right side window. Place the code into the left side using the arrows. It is possible to get the test case correct but not complete NOTE: Be careful! There are decoys! The this pointer is used extensively.. Assume that StringVar.h has the following declaration: #include <iostream> class StringVar {public:StringVar() : max_length(20) { // Default constructor size is 20value = new char[max_length+1];value[0] = '0円';}StringVar(int size); // Takes an int for sizeStringVar(const char cstr[]); // Takes a c-string and copies itStringVar(const StringVar& strObj); // Copy Constructor~StringVar(); // Destructorint size() const { return max_length; } // Access capacityconst char* c_str() const { return value; } // Access valueint length() const { return strlen(value); } // Access lengthStringVar& operator= (const StringVar& rightObj);std::istream& operator>>...

Write a java code for this. Strings Read the paragraph and encrypt the content using the following rules; "The String, StringBuffer, and StringBuilder classes are defined in java.lang. Thus, they are available to all programs automatically. All are declared final, which means that none of these classes may be subclassed. This allows certain optimizations that increase performance to take place on common string operations. All three implement the CharSequence interface." RULES The words ‘the’, ‘and’, and ‘for’ should be replaced by their reverse strings in upper case letters (use predefined functions reverse() and toupper()) The first occurrence of the word ‘are’ should be replaced by ‘AREERA’ and the last occurrence of the word ‘of’ to be replaced by ‘123’.

53. Write a class with two instance variables, representing an old password and a new password. Write a recursive method that returns the number of places where the two passwords have different characters. The passwords can have different lengths. Write another, nonrecursive method returning whether the two passwords are sufficiently different. The method takes an int parameter indicating the minimum number of differences that qualify the passwords as being sufficiently different. Your program should include a client class to test your class.

Using python: (see attached- I need help with part Q2) Add a method to the person class name it (username) that takes the email and take off all the part from @ and after, and assigns the string before the @ sign to a variable username. For example: malabdullah@UT.edu, the method will assign 'malabdullah' as the username.

In this problem you will fill out three functions to complete the Group ADT and the Diner ADT. The goal is to organize how diners manage the groups that want to eat there and the tables where these groups sit. It is important to take the time to read through the docstrings and the doctests. Additionally, make sure to not violate abstraction barriers for other ADTS, i.e. when implementing functions for the Diner ADT, do not violate abstraction barriers for the Group ADT, and vice versa. # Diner ADT def make_diner (name): """ Diners are represented by their name and the number of free tables they have.""" return [name, 0] def num_free_tables (diner): return diner [1] def name (diner): return diner [0] # You will implement add_table and serve which are part of the Diner ADT # Group ADT def make_group (name): Groups are represented by their name and their status.""" return [name, 'waiting'] |||||| def name (group): return group [0] def status (group): return group [1] def start_eating...

Implement a nested class composition relationship between any two class types from the following list: Advisor Вook Classroom Department Friend Grade School Student Teacher Tutor Write all necessary code for both classes to demonstrate a nested composition relationship including the following: a. one encapsulated data member for each class b. inline default constructor using constructor delegation for each class c. inline one-parameter constructor for each class d. inline accessors for all data members e. inline mutators for all data members

Written in Python with docstring please if applicable Thank you

Java provides a mechanism that enables a program to be executed from the command line, as an application. Java runtime execution works on the basis that the class executed must have a: (constructor? inner class? method?) named `main’ that is: (final? static? local?) , public and void. This should take an : (StringBuffer? ArrayList? Array?) of Strings as its only argument. Execution is begun by (calling this method? clicking the BlueJ Run button? selecting this method from the dropdown menu?) . Select the correct answer.

Java Programming: Write a lexer that prints out the shank.txt. Below is the shank.txt that needs to be printed out as a series of tokens and attached is the rubric of all the components the lexer needs to have. Shank.txt Fibonoacci (Iterative) define add (num1,num2:integer var sum : integer)variable counter : integerFinonacci(N)int N = 10;while counter < Ndefine start ()variables num1,num2,num3 : integeradd num1,num2,var num3{num1 and num2 are added together to get num3}num1 = num2;num2 = num3;counter = counter + 1; GCD (Recursive) define add (int a,int b : gcd)if b = 0sum = asum gcd(b, a % b) GCD (Iterative) define add (inta, intb : gcd)if a = 0sum = bif b = 0sum = awhile counter a != bif a > ba = a - b;elseb = b - a;sum = a;variables a,b : integera = 60b = 96subtract a,b

In Java, we can create an array of class objects. True O False

g) Make a class Class (as in a class of students, not a class as in a class of objects) that stores several Student objects. Store a list of students in an attribute called students. The initializer method should initialize the class as an empty class (no students). Implement a method add_student() that takes an object of class Student and adds it to class. Implement method pass_rate() that determines the fraction of students that pass the class (have a grade of >= 6). python code!!