Please use java.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 a given argument. 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 a given argument, are removed. For CustomString "my lucky numbers are 6, 8, and 19.", calling remove("ra6") will return "my lucky numbers e 6, 8, nd 19.".There are 5 methods that need to be implemented in the CustomString class:● getString() - Returns the current string.● setString(String string) - Sets the value of the current string.● remove(String arg) - Returns a new string version of the current string where thealphabetical characters specified in the given arg, are removed.● reverse(String arg) - Returns a new string version of the current string where thecapitalization is reversed (i.e., lowercase to uppercase, and uppercase to lowercase) forthe alphabetical characters specified in the given arg.● filterLetters(char n, boolean more) - Returns a new string version of the current stringwhere all the letters either >= or operators.For example:char myChar1 = ‘s’; char myChar2 = ‘t’;//compared is trueboolean compared = myChar1 < myChar2; // TODO write at least 3 additional test casesTips for this AssignmentIn this assignment, some tips are given as follows:APennEngineeringTONUINE LEARNINGIntroduction to Java & Object Oriented Programming• Converting a String to an array of chars in Java:• Use the "toCharArray()" method of a StringFor example:String mystring - "hello";//arrayofChars contains 'h', 'e', 'l', 'l', 'o'Char[] arrayofChars - mystring.toCharArray ():Checking whether a specified char value is a letter in Java:• Use "Character.isLetter(char)"For example://isLetter is trueboolean isLetter - Character.isLetter ('t'):Checking whether a specified char value is uppercase in Java:• Use "Character.isUpperCase(char)"For example://isUpperCase is trueboolean isUpperCase - character.isUpperCase ('T');Checking whether a specified char value is lowercase in Java:o Use "Character.isLowerCase(char)"For example://isLowerCase is trueboolean isLowerCase - Character.isLowerCase ('t');• Converting a character to uppercase in Java:• Use "Character.toUpperCase(char)"For example://myChar is 'T'char mychar = Character.toUpperCase ('t');Converting a character to lowercase in Java:o Use "Character.toLowerCase(char)"For example://myChar is 't'char mychar - Character.toLowerCase ('T');Comparing characters in Java:o You can compare characters like you compare numbers using ==, <, and >operators.For example:char mycharl - 's';char mychar2 = 't';// compared is trueboolean compared - mycharl < myChar2;PennEngineeringONLINE LEARNINGIntroduction to Java & Object Oriented ProgrammingSubmissionYou have been provided with CustomString java and CustomString Testjava. To complete theassignment, implement the methods in CustomString.java, making sure you pass all the testsin CustomStringTestjava. Then write at least 3 additional and distinct test cases for eachunit test method in CustomString Testjava. Do not modify the name of the methods inCustomString java or the automated testing will not recognize it.You will submit two files for this assignment: CustomString java and CustomStringTest.java.Make sure your program and the unit testing files run without errors! Submit the completedprogram using the steps outlined in the assignment in Coursera. The AssignmentIn this assignment, you will implement a simple class called CustomString. This classrepresents 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 stringversion of the current string where the capitalization is reversed (i.e., lowercase to uppercaseand uppercase to lowercase) for the alphabetical characters specified in a given argument. ForCustomString "abe, 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 thecurrent string where the alphabetical characters specified in a given argument, are removed.For CustomString "my lucky numbers are 6, 8, and 19.", calling remove("ra6") will return "mylucky numbers e 6, 8, nd 19.".There are 5 methods that need to be implemented in the CustomString class:• getString) - Returns the current string• setString(String string) - Sets the value of the current string.• remove(String arg) - Returns a new string version of the current string where thealphabetical characters specified in the given arg, are removed.• reverse(String arg) - Returns a new string version of the current string where thecapitalization is reversed (i.e., lowercase to uppercase, and uppercase to lowercase) forthe alphabetical characters specified in the given arg.filterLetters(char n, boolean more) - Returns a new string version of the current stringwhere all the letters either >= or <= the given char n, are removed..A PennEngineeringTONLINE LEARNINGIntroduction to Java & Object Oriented ProgrammingEach method has been defined for you, but without the code. See the javadoc for each methodfor instructions on what the method is supposed to do and how to write the code. It should beclear enough. In some cases, we have provided hints and example method calls to help youget started.For example, we have defined a "setString" method for you (see below) which sets the value ofthe current string. Read the javadoc, which explains what the method is supposed to do. Thenwrite your code where it says "II TODO" to implement the method. You'll do this for eachmethod in the program.* Sets the value of the current string.* @param string value to be set*/public void setstring (String string) {// TODO Implement methodIn addition, you will write unit tests to test your method implementations. Each unit testmethod has been defined for you, including some test cases. First make sure you pass all ofthe provided tests, then write additional and distinct test cases for each unit test method.For example, we have defined a "testSetString" method for you (see below) which tests the"setString" method. Pass the tests provided then write additional tests where it says "//TODO", You'lu do this for each unit test method in the program.eTestvoid testSetString () {//string should be null to start, before setting itassertNull (this.myCustomstring.getString 0):this.myCustomstring.setString ("Good-bye!"):assertEquals ("Good-bye!", this.myCustomString.getString ()):// TODO write at least 3 additional test casesTips for this AssignmentIn this assignment, some tips are given as follows:PennEngineeringTONLINE LEARNING

Java Program used to answer this question

Please use java. 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 a given argument. 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 a given argument, are removed. For CustomString "my lucky numbers are 6, 8, and 19.", calling remove("ra6") will return "my lucky numbers e 6, 8, nd 19.". There are 5 methods that need to be implemented in the CustomString class: ● getString() - Returns the current string. ● setString(String string) - Sets the value of the current string. ● remove(String arg) - Returns a new string version of the current string where the alphabetical characters specified in the given arg, are removed. ● reverse(String arg) - 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. ● filterLetters(char n, boolean more) - Returns a new string version of the current string where all the letters either >= or operators. For example: char myChar1 = ‘s’; char myChar2 = ‘t’; //compared is true boolean compared = myChar1 < myChar2;

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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