For loop getting multiple values

Question

I have a for loop

for (int i = 0; i < knowledgeD.size(); i++ )
        knowledgeD.get(i).get(0);

        for (int k = 0; k < knowledgeD.size(); k++ )
            knowledgeD.get(k).get(1);

However I am majorly confused at how I can store all the results of the for loop to one variable I guess?

like say for example i Do this

 for (int i = 0; i < knowledgeD.size(); i++ )
        w =knowledgeD.get(i).get(0);

        for (int k = 0; k < knowledgeD.size(); k++ )
            y = knowledgeD.get(k).get(1);

then in my toString() i do

String s = "{true@" + w + " " +"false@"  + w.complement() + "}" + "@" + this.y;

Where complement() is the complement on the w fraction, in this case 9/11.

This gives me

 {true@135/163 false@28/163}@163/1680}

Which is fantastic, but thats only the last value of the array of arrays

[[2/11, 11/48], [8/35, 35/288], [16/43, 43/288], [75/152, 19/210], [4/5, 5/16], [135/163, 163/1680]]

If anyone can shed light that would be much appreciated. Basically the @ true and @ false are probability of a coinflip being heads or tails.

Cheers Sim PS the datatypes for w and y are BigFractions which are basically fractions, this datatype is in another class.

In your toString() of which class? (Side note: you could then close your other question :) — sp00m
– sp00m, Commented Mar 29, 2013 at 9:58

Pragnani Kinnera · Accepted Answer · 2013-03-29 10:35:54Z

1

Try this

Just append the next value to the s like this

StringBuilder str="";

for (int i = 0; i < knowledgeD.size(); i++ )
{
        w =knowledgeD.get(i).get(0);
            y = knowledgeD.get(i).get(1);

    str.append("{true@" + w + " " +"false@"  + w.complement() + "}" + "@" + this.y);
     str.append(" ");
}

And in your toString() method just call s=str.toString();

edited Mar 29, 2013 at 10:35

answered Mar 29, 2013 at 10:03

Pragnani Kinnera

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6 Comments

niculare Over a year ago

It would be better to use a StringBuilder in this case to avoid creation of a new String for each append operation.

Pragnani Kinnera Over a year ago

@niculare yeah really..I'll edit according to your suggestion

Sim Over a year ago

hmm thanks i think its working let me double check tho i fixed some stuff up

Sim Over a year ago

nevermind fixed again, just changed it to one for loop thanks

Pragnani Kinnera Over a year ago

@Sim Sorry it was my mistake just remove inner for loop.. check my updated answer

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