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Question

When I put the value of hourOfDay -1, -2, -3..... the returned value should be false but it is coming true :(

package com.company;

public class BarkingDog {
    public static boolean shouldWakeUp(boolean barking, int hourOfDay){
        if(barking && hourOfDay >24 && hourOfDay <0){
            return false;
        }
        else if(barking && hourOfDay < 8 && hourOfDay < 23){
            return true;
        }

    return false;
    }
}

Answer 1

Looks like you meant to use || there instead of && :

if (barking && (hourOfDay >24 || hourOfDay <0)) {
    return false;
}

Although it seems the entire method can be simplified to a single expression:

return barking && hourOfDay > 8 && hourOfDay < 23;

Answer 2

This will work for you. Check && is for both conditions and you should use OR ||

if (barking && (hourOfDay > 30 || hourOfDay < 0)) {
            return false;
        } else if (barking && hourOfDay < 8 && hourOfDay < 25) {
            return true;
        }

        return false;
    }