Question

I am currently trying to write a program which rounds a “double” variable to two decimal places.

I have the method:

DecimalFormat df = new DecimalFormat("#.00");

However, when I apply the method:

double x = df.format(y-z);

I get an error telling me a “double” was expected but a “string” was found.

Any suggestions as to how to fix this?

Thanks!

Answer 1

Try this

@Test
public void test() {
    int f = 100;

    double d = 123.456;
    double temp = d * f;
    double rounded = Math.round(temp);
    double to2dp = rounded / f;

    Assert.assertEquals(123.46, to2dp, 0.00001);
}      

The f = 100 is fro 2dp. You would use f = 10 for 1dp etc