Question

How can I change 2.5E7 to 2,500,000.00?

Answer 1

Try:

DecimalFormat format = new DecimalFormat("#0,0000.00");
String formattedNumber = format.format(number);

See here

If you are trying to parse 2.5E7 then you can do this

long number = Double.valueOf("2.5E7").longValue();