round to two decimal places

[javaMike]

is there an easy way to round a double to two decimal places?

i.e. 1.98999 would round to 1.99

the math.round method only rounds to nearest integer.

decimalformat class converts number to a string.

i figure there must be an easy way to do this...?? pls advise.

[hardwired]

double[] d = { 1.0/3.0, Math.PI, 2.0/3.0 };
for(int j = 0; j < d.length; j++) {
    System.out.printf("d[%d] = %f%n", j, d[j]);
    double d2 = (int)Math.round(d[j] * 100)/100.0;
    System.out.printf("d2   = %f%n", d2);
}

[HansW]

Simple solution:

(Math.round(d*100))/100

[DarrylBurke]

Simple solution:

Wrong. Not a solution at all.

What Every Computer Scientist Should Know About Floating-Point Arithmetic

And since this thread is over 4 years old, I'm closing it. If you have any questions, please start your own thread.

db