我想以四舍五入的方法控制它的输出为6位的小数请问如何做到
public class FloatTest
{
public static void main(String[]args)
{
float f1,f2;
short a=3;
float f3=1f;
System.out.println(f3/a);
}
}
public class FloatTest
{
public static void main(String[]args)
{
float f1,f2;
short a=3;
float f3=1f;
System.out.println(f3/a);
}
}
float c = (float)(Math.round(b*1000000))/1000000;
System.out.println(c);
public static double function2(double value, int decimalPlaces) {
NumberFormat nf = NumberFormat.getNumberInstance();
nf.setRoundingMode(RoundingMode.HALF_UP); // 四舍五入
nf.setMaximumFractionDigits(decimalPlaces);
nf.setMinimumFractionDigits(decimalPlaces);
return Double.valueOf(nf.format(value));
}