CODEWITHSUNDEEP
javabigdecimal
user3288184
user3288184

Reputation: 1

Why does it keep rounding when I use BigDecimal

So I am trying to calculate my average goals blocked by dividing how many I stopped by how many shots have been taken. How can I stop it from rounding my average

counter = goals blocked goalCounter = goals scored

avg.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        BigDecimal avgCalc = new BigDecimal(counter/goalCounter);
        tvDisplayAvg.setText("Goal Avg: " + avgCalc);
    }
});

So I got it to divide and get decimals but is there a way to set a limit of only dividing to the thousandths place?

Upvotes: 0

Views: 215

Answers (2)

Dima
Dima

Reputation: 8662

your rounding comes probably from counter/goalCounter if you are using big decimal, stay with it.

avg.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {

        BigDecimal c = new BigDecimal(counter);
        BigDecimal g = new BigDecimal(goalCounter);
        BigDecimal answer=c.divide(g);

        tvDisplayAvg.setText("Goal Avg: " + amswer.toString());
    }
});

Upvotes: 5

Epiglottal Axolotl
Epiglottal Axolotl

Reputation: 1048

The problem might be that counter and goalCounter are both ints. Try casting one of them to double when you divide (e.g. counter/(double)goalCounter). This is because if Java sees you dividing two integers, the result will also be an integer.

If they are not ints (i.e. they are floats or doubles), the float and double types have limited precision, and the BigDecimal class was created to rectify this situation. Make two BigDecimals - one for each variable - and then assign avgCalc to their quotient.

Upvotes: -1

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