do not know what i am doing wrong - please help

Question about the task

Different methods for different types

Java Core, Level 5, Lesson 12

Resolved

do not know what i am doing wrong

1. Read data from the console until the word "exit" is entered.
2. For each value (except "exit"), call the print method. If the value:
2.1. contains a period ("."), then call the print method for Double;
2.2. is greater than zero, but less than 128, then call the print method for short;
2.3. less than or equal to zero or greater than or equal to 128, then call the print method for Integer;
2.4. otherwise, call the print method for String.

Requirements:

The program must read data from the keyboard.
The program should stop reading data from the keyboard after "exit" is entered.
If the entered string contains a period (".") and can be correctly converted to a Double, the print(Double value) method should be called.
If the entered string can be correctly converted to a short and the resulting number is greater than 0, but less than 128, the print(short value) method should be called.
If the entered string can be correctly converted to an Integer and the resulting number is less than or equal to 0 or greater than or equal to 128, the print(Integer value) method should be called.
In all other cases, the print(String value) method should be called.

package com.codegym.task.task15.task1519; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.CacheRequest; /* Different methods for different types */ public class Solution { public static void main(String[] args) throws IOException { //write your code here BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String input; while (true) { input = reader.readLine().trim().replaceAll("\\s+", ""); if (input.equals("exit")) break; if (input.contains(".") && isDouble(input)) { try { Double doubleInput = Double.parseDouble(input); print(doubleInput); } catch (NumberFormatException ex) { ex.printStackTrace(); } } else if (isShort(input)) { try { Short shortInput = Short.parseShort(input); if (shortInput > 0 && shortInput < 128) print(shortInput); } catch (NumberFormatException ex) { ex.printStackTrace(); } } else if (isInteger(input)) { try { Integer integerInput = Integer.parseInt(input); if (integerInput <= 0 || integerInput >= 128) print(integerInput); } catch (NumberFormatException ex) { ex.printStackTrace(); } } else print(input); } } // check if input is a Double public static boolean isDouble(String input) { try { Double doubleInput = Double.parseDouble(input); } catch (NumberFormatException ex) { return false; } catch (NullPointerException ex) { return false; } return true; } // check if input is a Short public static boolean isShort(String input) { try { Short shorInput = Short.parseShort(input); } catch (NumberFormatException ex) { return false; } catch (NullPointerException ex) { return false; } return true; } //check if input is an Integer public static boolean isInteger(String input) { try { Integer integerInput = Integer.parseInt(input); } catch (NumberFormatException ex) { return false; } catch (NullPointerException ex) { return false; } return true; } public static void print(Double value) { System.out.println("This is a Double. Value: " + value); } public static void print(String value) { System.out.println("This is a String. Value: " + value); } public static void print(short value) { System.out.println("This is a short. Value: " + value); } public static void print(Integer value) { System.out.println("This is an Integer. Value: " + value); } }

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Fa Yu

Level 16 , Tashkent, Uzbekistan

5 July 2019, 15:01

I also stuck on this. My code works perfectly as per conditions, but won't verify.

package com.codegym.task.task15.task1519;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

/*
Different methods for different types

*/

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        while (true) {
            String input = reader.readLine();
            try {
                if (input.equals("exit")) break;

                else if ((input.contains(".")) && (Double.parseDouble(input) >= 0 || Double.parseDouble(input) <= 0)) {
                    print(Double.parseDouble(input));
                } else if (Short.parseShort(input) > 0 && Short.parseShort(input) < 128) {
                    print(Short.parseShort(input));
                } else if (Integer.parseInt(input) <= 0 || Integer.parseInt(input) >= 128) {
                    print(Integer.parseInt(input));
                } else throw new Exception();

            } catch (Exception e) {
                print(input);
            }

            //write your code here
        }
    }

    public static void print(Double value) {
        System.out.println("This is a Double. Value: " + value);
    }

    public static void print(String value) {
        System.out.println("This is a String. Value: " + value);
    }

    public static void print(short value) {
        System.out.println("This is a short. Value: " + value);
    }

    public static void print(Integer value) {
        System.out.println("This is an Integer. Value: " + value);
    }
}

Satya Vath

Level 31 , Vijayawada, India

10 September 2019, 05:01

I think the short input should be after the integer input