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) {

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) {

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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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) {

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