How to use methods with constructor in java?

Question

I have some strange question.

I want to make constructor in java output some statements without using System.out inside the constructor itself.

This is my code:

public class NewClass1 {

public int view()
{
return 6;
}

public NewClass1()
{
    int a = view();
    System.out.println(a);
}

public static void main(String argv[])
{
    NewClass1 object = new NewClass1();
}

}

Now when i create object form that class it will output(6).

My question is: output 6 once the object is created but without using any outputs statements?

Your question is indeed strange. It is so strange that I do not get, what you are asking. — Turing85, Nov 05 '15 at 22:27
So, you want to write on the standard output without referring to it, don't you? That's a strange question, I agree. — skypjack, Nov 05 '15 at 22:30
Maybe you can explain better what a you are trying to achieve? — Vlad Z, Nov 05 '15 at 22:50
I want to output 6 without using any output statements inside the class or inside the constructor — Beginner Programmer, Nov 05 '15 at 22:53
How can you output something without using output statements? It makes no sense. — Paul Boddington, Nov 05 '15 at 22:56
This answers your question: http://stackoverflow.com/questions/5230565/can-i-call-methods-in-constructor-in-java and gives an other way to let you run the code: static block. — Flummox - don't be evil SE, Nov 05 '15 at 23:07
You can step through the code with a debugger. That would allow you to see the values of variables without using `System.out`. Is that what you mean? — Paul Boddington, Nov 05 '15 at 23:11

Brandon Laidig · Answer 1 · 2015-11-05T22:56:36.470

1

You could create a class that handles only printing what you feed it like so

public class ConstructorPrinter {

    public void print(int a) {
        System.out.println(a);
    }
}

And then in your NewClass1 class you could use it in the following way

public class NewClass1 {
    ConstructorPrinter constructorPrinter = new ConstructorPrinter();

    public int view()
    {
        return 6;
    }

    public NewClass1()
    {
        constructorPrinter.print(view());
    }

    public static void main(String argv[])
    {
        NewClass1 object = new NewClass1();
    }
}

edited Nov 05 '15 at 22:56

answered Nov 05 '15 at 22:28

Brandon Laidig

430
2
14

no, this is not my question. my question is that i want to output a value without using System.out inside the class or constructor. – Beginner Programmer Nov 05 '15 at 22:35
@BeginnerProgrammer if you want to output something while you are in the constructor, you need to use `println(...)` within the constructor (at least if you want your code to stay somewhat simple). – Turing85 Nov 05 '15 at 22:40
@BeginnerProgrammer would an entirely new class that just prints whatever you feed it be what you're looking for then? If so, I can help you out with that – Brandon Laidig Nov 05 '15 at 22:41
@BrandonLaidig not exactly what i am looking for but anyway post your answer to see :) – Beginner Programmer Nov 05 '15 at 22:51
@BeginnerProgrammer I've updated my answer. Let me know – Brandon Laidig Nov 05 '15 at 22:56
it's a good answer and +1 to it ... but if i tell you that i don't need to use any output statements inside any classes or constructors, is this possible? if impossible then your answer is the best one. – Beginner Programmer Nov 05 '15 at 23:04
2

@BeginnerProgrammer to the best of my knowledge, it's not possible to output without using an output – Brandon Laidig Nov 05 '15 at 23:06
1

If you want to output something, at some point it has to go past output. You can put a lot of stuff in between, but is is like getting to an other country; it does not matter how long you make the road, or how weird the way you take is, at one point you will have to cross the border. – Flummox - don't be evil SE Nov 05 '15 at 23:11

How to use methods with constructor in java?

1 Answers1