Java How to disable rounding in decimalformat

Can I disable rounding in decimalformat?

For example:

DecimalFormat f = new DecimalFormat();

f.parSEObject( “123456789012345.99”);

The result is 1.2345678901234598e14

Java version "1.6.0_21"

Solution

This has nothing to do with the functionality of Java This is due to the limited precision of IEEE 64 bit double floating point numbers In fact, all data types have their precision limits Home is bigger than others

double d = 123456789012345.99;
System.out.println(d);

print

1.2345678901234598E14

If you want to be more precise, use BigDecimal

BigDecimal bd = new BigDecimal("123456789012345.99");
System.out.println(bd);

print

123456789012345.99

Even BigDecimal has limits, but they are far more than you or anyone else needs (about 2 billion)

Edit: the largest known prime number is suitable for BigDecimal http://primes.utm.edu/largest.html