Given are two strings, input string and a mask string that remove all the characters of the mask…

Given are two strings, input string and a mask string that remove all the characters of the mask string from the original string. Example: INPUT: ORIGINALSTRING: communication MASK STRING: mont OUTPUT: cuicai A class StringOp is defined as follows to perform above operation. Some of the members of the class are given below: Class name : StringOp Data members/instance variables: str : to store the original string msk : to store the mask string nstr : to store the resultant string Methods / Member functions: StringOp() : default constructor to initialize the data member with legal initial value void accept( ) : to accept the original string str and the mask string msk in lower case void form() : to form the new string nstr after removal of characters present in mask from the original string void display( ) : to display the original string and the newly formed string nstr Specify the class StringOp giving details of the constructor( ), void accept( ), void form() and void display( ). Define a main( ) function to create an object and call all the functions accordingly to enable the task.

import java.util.Scanner;

class StringOp
{
    String str;   // original string
    String msk;   // mask string
    String nstr;  // resultant string

    StringOp()
    {
        str = "";
        msk = "";
        nstr = "";
    }

    void accept()
    {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter the original string:");
        str = sc.nextLine().toLowerCase();
        System.out.println("Enter the mask string:");
        msk = sc.nextLine().toLowerCase();
    }

    void form()
    {
        for (int i = 0; i < str.length(); i++)
        {
            char ch = str.charAt(i);
            if (msk.indexOf(ch) == -1)
                nstr = nstr + ch;
        }
    }

    void display()
    {
        System.out.println("Original string : " + str);
        System.out.println("New string      : " + nstr);
    }

    public static void main(String args[])
    {
        StringOp ob = new StringOp();
        ob.accept();
        ob.form();
        ob.display();
    }
}