Question

We would like to give our users the option of filtering out profanity . Suppose that we consider the words cat, dog, and llama to be profane. Write a program that reads a string from the keyboard and tests wether the string contains one of our profane words. Your program should find words like cAt that differ only in case.

Attempt:

import java.util.Scanner;

public class Assign5 {
    public static void main(String[] args) {
        String cat,dog,llama,x;
        System.out.println("Enter a word");
        Scanner keyboard = new Scanner (System.in);

        x = keyboard.next();
        x.equalsIgnoreCase(x);

        if(x.indexOf("cat")!=-1&&x.indexOf("dog")!=-1&&x.indexOf("llama")!=-1);
        {
            System.out.println("Profanity Detected");
        }
        else
        {
            System.out.println("No Profanity Detected");     
        } 
    }

It’s underlining else for some reason so I can’t run it. What am I doing wrong?

I am not allowed to use: for, while, and arrays. We haven’t gotten to those yet. I am only allowed to use: boolean, switch, and if-else. Also, I am using x.equalsIgnoreCase(x) to discard case identification. Will it work?

Answer 1

The problem is this:

if (x.indexOf("cat") != -1 
    && x.indexOf("dog") != -1 
    && x.indexOf("llama") != -1); // <-- look there

{
    System.out.println("Profanity Detected");
}

Do you notice something at the end of the “if”?

Hint the “{block}” isn’t part of the if! This is what is causing the “else” to underline.
Perhaps there are additional errors as well, but that’s a syntax error flat-out.

I format my code like this so I can spot these errors easily. Adopting good code formatting is a very productive task 🙂

if (expr) {
   ...
} else {
   ...
}