What is wrong w/ it?

Question about the task

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Please help

Make the ConsoleReader class, which will have 4 static methods:
String readString() - reads a string from the keyboard
int readInt() - reads a number from the keyboard
double readDouble() - reads a fractional number from the keyboard
boolean readBoolean() - reads the string "true" or "false" from the keyboard and returns the corresponding boolean value (true or false)

Please note: In each method, create a variable to read data from the console (BufferedReader or Scanner).

Requirements:

The readString method must read and return a String.
The readInt method must read and return an int.
The readDouble method must read and return a double.
The readBoolean method must read and return a boolean value.

package com.codegym.task.task06.task0610; import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.Scanner; public class ConsoleReader { static Scanner sc = new Scanner(System.in); public static String readString() throws Exception { String s = sc.nextLine(); return s; } public static int readInt() throws Exception { int a = sc.nextInt(); return a; } public static double readDouble() throws Exception { double d = sc.nextDouble(); return d; } public static boolean readBoolean() throws Exception { String s = sc.nextLine(); if (s.equals(true)){ return true;} else if (s.equals(false)){ return false;} } public static void main(String[] args) { } }

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Anthony Chalk

Level 30 , London, United Kingdom

14 December 2019, 22:01

The problem is with the readBoolean method, since you've written else if as opposed to just else, the program will return an error. This is because the method must always return a boolean value, but the else if makes it dependent on fulfilling that condition. Also, line 28, it should be a String i.e. "true", not true which is a boolean value

Lelush

Level 7

15 December 2019, 12:00

I changed my code but it gives me an error that i didnt initialized b, but when i tried to initialize it with true or false, it didt verify import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.Scanner; public class ConsoleReader { static Scanner sc = new Scanner(System.in); public static String readString() throws Exception { String s = sc.nextLine(); return s; } public static int readInt() throws Exception { int a = sc.nextInt(); return a; } public static double readDouble() throws Exception { double d = sc.nextDouble(); return d; } public static boolean readBoolean() throws Exception { String s = sc.nextLine(); boolean b; if (s.equals("true")){ b = true;} else if (s.equals("false")){ b = false;} return b; } public static void main(String[] args) { } }

Anthony Chalk

Level 30 , London, United Kingdom

15 December 2019, 12:04

You can't initalize variables withing an if/else block, only change their values. Try:

public static boolean readBoolean() throws Exception {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    String x = reader.readLine();
    boolean d = ((x.equals("true")));
    return d;
}

Lelush

Level 7

15 December 2019, 12:46

it gives me: Task requirements are not met. why? public static boolean readBoolean() throws Exception { String s = sc.nextLine(); boolean d = ((s.equals("true"))); return d; }