Add numbers in a string array- android

Question

I have a string like

String str = "102, 308, 409.5";

and I want to add the numbers in the string 102+308+409.5 and keep the result in variable. How can I achieve that?Thanks

Note I was trying to convert the string to string array and then to int array in the below code, but doesn't works.

int sum = 0;

String[] arr = str.split(",");
int[] numArr = new int[arr.length];

for(int i=0; i<arr.length; i++){

numArr[i] = Double.parseDouble(arr[i]);

sum+=numArr[i];

}

int sum and int[] numArr - but you want to sum doubles! — Phantômaxx
– Phantômaxx, Commented May 6, 2014 at 17:50
Read this docs.oracle.com/javase/tutorial/java/nutsandbolts/… — But I'm Not A Wrapper Class
– But I'm Not A Wrapper Class, Commented May 6, 2014 at 17:59

BlackHatSamurai · Accepted Answer · 2014-05-06 17:50:48Z

1

I'd give this a go:

double sum = 0;

String[] arr = str.split(",");
double[] numArr = new int[arr.length];

for(int i=0; i<arr.length; i++){

numArr[i] = Double.parseDouble(arr[i]);

sum+=numArr[i];

}

If you are going to parseDouble you need to put that into a double variable, whether that is an array, or just a standard variable.

answered May 6, 2014 at 17:50

BlackHatSamurai

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1 Comment

artist Over a year ago

My mistake, was keeping double in int. Thanks for pointing that out.

Yazan · Accepted Answer · 2014-05-06 18:21:47Z

0

ok, and why is the numArr[] in first place :)

double sum = 0;

String[] arr = str.split(",");
//double[] numArr = new int[arr.length];//delete this

for(int i=0; i<arr.length; i++){

numArr[i] = Double.parseDouble(arr[i]);

// sum+=numArr[i];//delete this

sum+=Double.parseDouble(arr[i]);

}

answered May 6, 2014 at 18:21

Yazan

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