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Question about the task

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it works perfectly fine but I cant pass the requirments

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.util.*; /* Different methods for different types */ public class Solution { public static void main(String[] args) throws IOException { //write your code here Scanner sca = new Scanner(System.in); ArrayList<String> words = new ArrayList<String>(); while(true) { String str = sca.nextLine(); if(!str.equals("exit")) { words.add(str); } else break; } String[] strs = words.toArray(new String[0]); for(int i=0;i<strs.length;i++) { if(strs[i].contains(".")) { print(Double.parseDouble(strs[i])); } else { try{ int x = Integer.parseInt(strs[i]); if(x<128&&x>0) {print(Short.parseShort(strs[i]));} else {print(Integer.parseInt(strs[i]));} }catch(Exception e){print(strs[i]);} } } } 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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WIDMO

Level 25 , Gdańsk, Poland

Expert

30 April 2020, 16:46

Your code is working like this: 1. Loop (18line, the while statement) 1.1 I'm reading string (if it's exit i'm breaking) 1.2 I'm working on it 1.3 I'm printing it on the screen. 2. I'm returning to point 1. In the solution to the task you should write something like this: 1. Loop { 1.1 I'm reading string (if it's exit i'm breaking) 1.2 I'm putting the String to an Array; } 2. Loop { 2.1 I'm reading string from array 2.2 I'm working on the string 2.3 I'm printing results from 2.2 on the screen. }

Andreas Dengler

Level 16 , Bielefeld, Deutschland

1 May 2020, 04:47

Okay in my opinion it is not clear thst it needs to be read to an array and worked on it again. I thought they want an Loop that does it for one word and then loop it to the next word. I try it your way and come back with an result. Thanks in advance already

Andreas Dengler

Level 16 , Bielefeld, Deutschland

2 May 2020, 06:12

I updated my code so you can see my changes. I done it the way you told me but I still cant pass the last four requirments. Please look at the code and tell me whst is still wrong because I dont understand the Provlem. Again the code works perfectly and the result is right.

WIDMO

Level 25 , Gdańsk, Poland

Expert

2 May 2020, 06:57

Can u send me ur code after the changes has been dane?

Andreas Dengler

Level 16 , Bielefeld, Deutschland

2 May 2020, 14:39

when you look at the code you see already the new version wirh two loops

WIDMO

Level 25 , Gdańsk, Poland

Expert

2 May 2020, 15:36

In 56 line u've got ';' so i that u haven't made any changes ;) But let's start from the beginning: 1. U got a string. 2. U check if it has a dot ('.') inside and if u parse it it won't be infinity. If everythin if ok just print the output. U can do that with something like that:

if (s.contains(".")&&(!Double.isNaN(Double.parseDouble(s)))) {
     print(Double.parseDouble(s));
}

if If u got a dot inside parsed string is not a number i can print string the String as ur output. U can write something like that:

else if (Double.isNaN(Integer.parseInt(s))) {
       print((String) s);
}

Now is the easiest part, You have to check where your number belongs and if not just print it as a String. Btw. u should use Integer.MAX_VALUE u don't wont to write explicitly the values ;)

liczba = Integer.parseInt(s);
    if (liczba<128&&liczba>0)
        print(Short.parseShort(s));
    else if (liczba<=0||liczba<Integer.MAX_VALUE)
        print((Integer) liczba);
    else print(s);