I'm lost why both buffered reader and scanner don't verify.

Question about the task

Under discussion

package com.codegym.task.task04.task0416;

/*
Crossing the road blindly

*/
import java.util.Scanner;
import java.io.*;

public class Solution {
    public static void main(String[] args) throws Exception {
        //write your code here
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        //Scanner sc = new Scanner (System.in);
        //double t = sc.nextInt();

        String time = reader.readLine();
        double t = Integer.parseInt(time);

        String green = "green";
        String yellow = "yellow";
        String red = "red";

        if (t%3==0)
            System.out.println(green);
        else if (t%4==0)
            System.out.println(yellow);
        else if (t%5==0)
            System.out.println(red);

    }
}

it passes when it's not a decimal though I'm not certain why.

The pedestrian traffic light is programmed as follows:
at the beginning of each hour, the green signal is on for three minutes,
then the signal is yellow for one minute,
and then it is red for one minute.
Then the light is green again for three minutes, etc.
Use the keyboard to enter a real number t that represents the number of minutes that have elapsed since the beginning of the hour.
Determine what color the traffic light is at the specified time.
Display the result as follows:
"green" if the light is green,
"yellow" if the light is yellow, and
"red" if the light is red.

Example for 2.5:
green
Example for 3:
yellow
Example for 4:
red
Example for 5:
green

Requirements:

The program should read a real number from the keyboard.
The program should display text on the screen.
If the light is green, display: "green"
If the light is yellow, display: "yellow"
If the light is red, display: "red"

package com.codegym.task.task04.task0416; /* Crossing the road blindly */ import java.util.Scanner; import java.io.*; public class Solution { public static void main(String[] args) throws Exception { //write your code here BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); //Scanner sc = new Scanner (System.in); //double t = sc.nextInt(); String time = reader.readLine(); double t = Integer.parseInt(time); String green = "green"; String yellow = "yellow"; String red = "red"; if (t%3==0) System.out.println(green); else if (t%4==0) System.out.println(yellow); else if (t%5==0) System.out.println(red); } }

Comments (3)

Popular
New
Old

You must be signed in to leave a comment

William Leininger

Level 5 , Vancouver, WA, United States

10 February 2019, 19:37

I figured out my conditions in my if statements weren't going to net me the results I actually needed. I also realized that I needed to. I read over the other help threads. Identified the % operator I had forgot the meaning of - I had thought it was division not return the remainder. got my code solved. Question, is the below code possible to condense?

BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        String time = reader.readLine();
        double ti = Double.parseDouble(time);
        double t=ti%5;

//becomes the below
double t = Double.parseDouble(BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)));

Guadalupe Gagnon

Level 37 , Tampa, United States

10 February 2019, 19:46

On line 8,

D.pD(new BufferedReader(new InputStreamReader(System.in)).readline());

Muhammad Yasir

Level 5 , Islamabad, Pakistan

14 February 2019, 15:07

Try this code. It is working: InputStream inputStream = System.in; Reader inputStreamReader = new InputStreamReader(inputStream); BufferedReader bufferedReader = new BufferedReader(inputStreamReader); String st_t = bufferedReader.readLine(); double n_t = Double.parseDouble(st_t); if(n_t%5 < 3) System.out.println("green"); else if(n_t%5 < 4) System.out.println("yellow"); else System.out.println("red");