convert 2 Dimensional array String to 2 Dimensional Array Double

Question

I have an array that contains number value and a String. I want convert that array into double. I have tried this:

int tableStringLength=tableString.length;
double [][]tableDouble= null;

for(int i=0; i<tableStringLength; i++) {
    for(int j=0; j<tableStringLength; j++) {
        tableDouble[i][j]= Double.parseDouble(tableString[i][j]);
    }
}

but it returns nothing, not null or zero when I try to display in screen.

I understand that tableString is an array of String that are actually numbers , is it ? — Rndm
– Rndm, Commented Jul 14, 2012 at 5:46

user1168577 · Accepted Answer · 2012-07-14 05:42:34Z

3

You didn't instantiate the double array:

double[][] tableDouble = new double[tableStringLength][tableStringLength];

answered Jul 14, 2012 at 5:42

user1168577

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user1168577 Over a year ago

Does tableString have any values? Are you able to print tableString values?

sephtian · Accepted Answer · 2012-07-14 05:52:01Z

2

thanks for all answer pals, but after i ask to my friend, she suggested to use

tableDouble[i][j]= Double.valueOf(tableString[i][j]).doubleValue();

and it works :)

answered Jul 14, 2012 at 5:52

sephtian

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