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javafloating-pointdecimalroundingbigdecimal

Float round up to 2 decimals java

I'm trying to round a float up to 2 decimals.

I've 2 float values:

1.985
29.294998

Both of them will need to be rounded up so I end up with the following:

1.99
29.30

When I use the following method:

public static Float precision(int decimalPlace, Float d) {

    BigDecimal bd = new BigDecimal(Float.toString(d));
    bd = bd.setScale(decimalPlace, BigDecimal.ROUND_HALF_UP);
    return bd.floatValue();
  }

Te result is:

1.99
29.29
Solution

  • Since you are using BigDecimal.ROUND_HALF_UP, 29.294998 is rounded to 29.29. You might want to use BigDecimal.ROUND_UP instead.

    Check BigDecimal doc for more informations on each rounding available.