how to convert double to 2 number after the dot? [duplicate]

Question

Possible Duplicate:
Round a double to 2 significant figures after decimal point

how to convert double to 2 number after the dot ?

for example:

double x=123.45678;

i need that x=123.45 (in java for android)

thanks in advance

Answer 1

try this code

double x=123.45678;
DecimalFormat df = new DecimalFormat("#.##");
String dx=df.format(x);
x=Double.valueOf(dx);

Answer 2

x = Math.floor(x * 100) / 100;