Question

I am trying to write a java method that takes two string parameters from a user and then returns the first input after removing the letters that appear in the second input.

For example:

if input1 = fortune and input2 = tune

then the method returns "for"

seems simple but I am not understanding exactly how to tackle this

thanks!!

Answer 1

import java.util.*;

class Solution

{

    // return true if ch is present in str

    public static boolean find(String str , char ch)

    {

        int i;

       

        // traverse the string

        for( i = 0 ; i < str.length() ; i++ )

        {

            // get character at index i using charAt(i)

            // if the current character is the required character

            if( str.charAt(i) == ch )

                return true;

        }

       

        // if ch is not found in str

        return false;

    }

   

    public static void main(String[] args)

    {

        // create a Scanner class object to get user input

        Scanner sc = new Scanner(System.in);

       

        System.out.print("Enter first string : ");

       

        // read string from user

        String str1 = sc.next();

       

        System.out.print("Enter second string : ");

       

        // read string from user

        String str2 = sc.next();

       

        String ans = "";

        int i;

       

        // traverse the first string

        for( i = 0 ; i < str1.length() ; i++ )

        {

            // get character at index i using charAt(i)

            // if the character at index i is not present in str2

            if( find( str2 , str1.charAt(i) ) == false )

                ans += String.valueOf( str1.charAt(i) );

        }

       

        System.out.println("\nResultant String : " + ans);

    }

}

Sample Output