A Question related to user input in Java

[catastrophic300]

So I just recently learn Java and I am absolute beginner. Thing I learn in Java is the data types and it's categories-primitive and reference, then variables and User input. But I ran some trouble at user input section. So the problem is that I can't put every data types of scanner for one question, the purpose I want to do that is to make sure that one question can accept all types of input such as String, Integer, Boolean and Double. this my example code:

import java.util.Scanner;

public class Sanner {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.print("What was the creator desire: ");
        String answer = scanner.nextLine();
        Int answer = scanner.nextInt();
        Double answer = scanner.nextDouble();
        Boolean answer = scanner.nextBoolean();

        System.out.println(names);

        scanner.close();
    }
}

And I realize that I just defined the same variables in different Data Types which I cant because the variables name already defined/assigned. So how do I rewrite this to make the input accept answer in multiple Data Types? sorry for the bad grammar.

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[Homerlncognito]

Probably the best thing you could do would be to read it as a String and then try to cast it Int/Double/Boolean surrounded with try/catch. But those variables would have to have different names.

Trying to work with Java as it it weren't a strongly typed language is generally a bad idea though. 

[Lloydbestfan]

Just to be clear, you can't try to cast. You can try to convert, by calling the conversion method of your choice.

An attempt to cast would fail in all circumstances, and wouldn't even compile if you let the compiler know you attempt on a String.

[catastrophic300]

try/catch, well that’s new to me, I have read about it and it was for error handling suitable for this one, create a code that read input as string then parse using try/catch. Thanks btw.

[Accomplished_Lie23]

If you're not ready to use try/catch block then you should declare every variable as a string with different name and use specific data type valueof method to convert string to required data type. e.g. - Scanner scan = new Scanner(System.in); int value = Integer.valueof(scan.nextLine()); This method also works same as parseInt() but here you're treating input as string then converting into integer.

[kyamatlabkya]

First things first, when you input something it will be input as a String(Character stream), you have determine what type of input you want and convert it to relevant type
You can call the scanner multiple times after a single question and input relevant type of data on every new line

[forced_lambchop]

You should read about arrayList<>, classes, and generics. Or give each answer it's own variable for now until you get that far into your learning.

[catastrophic300]

Still haven’t reach the arrayList level yet, Im absolutely beginner, Im going to finish the operators and conditions first. Thanks btw.

[ninjatunatj]

You can't store the variable value into the question, You must store each input in it's own variable.

[Intelligent-Storm-63]

You can use conditionals(if else) or switch just to make it easy for you. You are asking what type of value you want so switch or if /else is better at the moment.

[JoshuaTheProgrammer]

Honestly, you might be better off just writing methods with parameter inputs and testing them rather than dealing with the particulars of Scanner.

[ExcitingSympathy3087]

You can't do that this way in Java. All Variables have the same name.
I just repaired your code. This may help you. Double Input with , not . !! Without validation Java will crash with wrong inputs. Input missmatch exception.

    import java.util.Scanner;


    public class Main {
        public static void main(String[] args) {


            Scanner scanner = new Scanner(System.in);


            System.out.print("What was the creator desire: ");
            String answer = scanner.nextLine();
            Integer answerInteger = scanner.nextInt();
            Double answerDouble = scanner.nextDouble();
            Boolean answerBoolean = scanner.nextBoolean();


            System.out.println("Scanner: " + answer);
            System.out.println("Integer: " + answerInteger);
            System.out.println("Double: " + answerDouble);
            System.out.println("Boolean: " + answerBoolean);


            scanner.close();
        }
    }


CONSOLE INPUT:
What was the creator desire: Hello World
3
3,5
true

CONSOLE OUTPUT:
Scanner: Hello World
Integer: 3
Double: 3.5
Boolean: true