generating pi to nth digit java

Question

I wanted to know how I can generate pi to the nth digit. I have a couple of basic ideas.

1. Use Math.PI and increase the precision (if that\'s possib

Answer 1

You need to use MathContext to increase the precision of the BigDecimal

e.g.

MathContext mc = new MathContext(1000);
BigDecimal TWO = new BigDecimal(2, mc);

It's important that ALL the BigDecimals you use in your calculations use that MathContext. Heron's method should give you 1000 digits precision with only 10 iterations and a million digits with 20 iterations so it's certainly good enough. Also, create all the constant BigDecimals like e.g. 26390 only once at the start of your program.