Question

Modify the CharacterInfo class shown in Figure 7-3 so that the tested character is retrieved from user input.

Answer 1

The tested character is modified as given below. See the definition of tested character below.

What is characterization testing?

Michael Feathers created the phrase "characterization testing."

A characterization test (also known as Golden Master Testing) in computer programming.

It is a method of describing (characterizing) the actual behavior of an existing piece of software and thereby protecting legacy code against unwanted modifications through automated testing.

What is the modified characterInfo class?

Run on java, the modified characterInfo class is given as follows:

//import packages

import java.util.Scanner;

//Java class

public class InputCharacterInfo {

   //entry point of the program , main method

   public static void main(String[] args) {

       //creating object of Scanner class

       Scanner sc=new Scanner(System.in);

       //asking user to enter character

       System.out.print("Enter a character : ");

       //reading character

       char aChar=sc.next().charAt(0);

       System.out.println("The character is "+aChar);

       if(Character.isUpperCase(aChar))

           System.out.println(aChar+" is uppercase");

       else

           System.out.println(aChar+" is not uppercase");

       if(Character.isLowerCase(aChar))

           System.out.println(aChar+" is lowercase");

       else

           System.out.println(aChar+" is not lowercase");

       aChar=Character.toLowerCase(aChar);

           System.out.println("After toLowerCase(), aChar is "+aChar);

       aChar=Character.toUpperCase(aChar);

           System.out.println("After toUpperCase(), aChar is "+aChar);        

   }

}

Learn more about characterization testing in programming at;
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