Trying to learn methods.

[lekimo]

I'm trying to make a simple program so that in the main function the user should only have to write value.addera(); or value.subtrahera(); and the program will either +1 or -1 on the starting value. i'm running into a strange error that says

calc@5acac877

here is my code:

public class Räknare {
	
	public static void main(String[] arg)
	{
		calc value = new calc();
		value.dec(7, 5 , 10); // start, min, max
		value.addera();
		String show = value.toString();
		System.out.println(show);
	}
	
}

and

public class calc
{
	int minvärde,maxvärde,startvärde;
	public void dec(int start,int min, int max) 
	{
		if(start < min || start > max)
		{
			System.out.println("Ditt värde gick över gränsen");
		}
		
		if(min == 0 && max == 0)
		{
			min = Integer.MIN_VALUE;
			max = Integer.MAX_VALUE;
		}
		minvärde = min;
		maxvärde = max;
		startvärde = start;
	}
	
	public void addera()
	{
	startvärde += 1;
	}
	public void subtrahera()
	{
	startvärde -= 1;
	}
}

[KevinWorkman]

That's not an error. That's a String representation of an Object that has not overridden the toString() method. Think about it this way: how does Java know how to display an Object as a String? It doesn't, unless you tell it how to by overriding the toString() method.

[PhHein]

int minvärde,maxvärde,startvärde;

And never ever use Umlauts in java code!

[Tolls]

int minvärde,maxvärde,startvärde;

And never ever use Umlauts in java code!

Why not?
It's perfectly legal, and seems unecessarily Anglo-centric to bar them?

[PhHein]

I've have heard reports about strange effects. It's generally advised here in Germany not to do it. Something about different default system encodings on servers and developer systems, if I recall corretly.

[Tolls]

System encodings should have no effect on variables in Java code, as it should all be UTF.
I can see something when dealing with Strings that contain non-ASCII, but that's character encoding and nothing to do with Java and the compiler.

[JosAH]

I prefer a random combination of Cyrilic, Chinese and Arabic characters (and umlauts) just to poke fun at those ASCII-centric pommies and for obfuscation reasons ...

kind regards,

乔斯

[Tolls]

I would laugh if it turns out that means something rude...

Sadly you managed to spell Jos, unless Google translate is pulling a fast one.
I live in hope.

[JosAH]

I would laugh if it turns out that means something rude...

Sadly you managed to spell Jos, unless Google translate is pulling a fast one.
I live in hope.

You know me, I am not like that; or as we always use to say: 哦，你必须是一个愚蠢的英语猪狗，我扭动我的生殖器您对我们厂总的方向

kindest regards,

Jos ;-)

[lekimo]

That's not an error. That's a String representation of an Object that has not overridden the toString() method. Think about it this way: how does Java know how to display an Object as a String? It doesn't, unless you tell it how to by overriding the toString() method.

I see, the way i did it was this:

	@Override
	public String toString()
	{
		String resultat = Integer.toString(startvärde);
		return resultat;
	}

I suppose this is the only solution? Since as you said java does not know how to display an object as a string.

[KevinWorkman]

I see, the way i did it was this:

	@Override
	public String toString()
	{
		String resultat = Integer.toString(startvärde);
		return resultat;
	}

I suppose this is the only solution? Since as you said java does not know how to display an object as a string.

Did that work?

I wouldn't say it's the only solution. You could have written another method and called that, or created a method that takes a calc (which should be Calc, by the way) Object and returns a String, or... the options are endless. But since you were already calling the toString() method, it does make sense to specify what that method should do.