java - Rounding Bigdecimal values with 2 Decimal Places -


i want function convert bigdecimal 10.12 10.12345 , 10.13 10.12556. no function satisfying both conversion in same time.please achieve this.

below tried.

bigdecimal = new bigdecimal("10.12345");  a.setscale(2, bigdecimal.round_up) a.setscale(2, bigdecimal.round_ceiling) a.setscale(2, bigdecimal.round_down) a.setscale(2, bigdecimal.round_floor) a.setscale(2, bigdecimal.round_half_down) a.setscale(2, bigdecimal.round_half_even) a.setscale(2, bigdecimal.round_half_up)

output :

10.12345::10.13 10.12345::10.13 10.12345::10.12 10.12345::10.12 10.12345::10.12 10.12345::10.12 10.12345::10.12   bigdecimal b = new bigdecimal("10.12556");  b.setscale(2, bigdecimal.round_up) b.setscale(2, bigdecimal.round_ceiling) b.setscale(2, bigdecimal.round_down) b.setscale(2, bigdecimal.round_floor) b.setscale(2, bigdecimal.round_half_down) b.setscale(2, bigdecimal.round_half_even) b.setscale(2, bigdecimal.round_half_up)

output :

10.12556::10.13 10.12556::10.13 10.12556::10.12 10.12556::10.12 10.12556::10.12 10.12556::10.12 10.12556::10.12

i think roundingmode looking round_half_even. the javadoc:

rounding mode round towards "nearest neighbor" unless both neighbors equidistant, in case, round towards neighbor. behaves round_half_up if digit left of discarded fraction odd; behaves round_half_down if it's even. note rounding mode minimizes cumulative error when applied repeatedly on sequence of calculations.

here quick test case:

bigdecimal = new bigdecimal("10.12345"); bigdecimal b = new bigdecimal("10.12556");  = a.setscale(2, bigdecimal.round_half_even); b = b.setscale(2, bigdecimal.round_half_even);  system.out.println(a); system.out.println(b);

correctly prints:

10.12 10.13

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