package test;import java.text.DecimalFormat;public class digital {
public digital() {
} public static void main(String[] args){ float f=3.1415926f;
System.out.println("f="+f); DecimalFormat df=new DecimalFormat(".00"); System.out.println(df.format(f)); }}
public digital() {
} public static void main(String[] args){ float f=3.1415926f;
System.out.println("f="+f); DecimalFormat df=new DecimalFormat(".00"); System.out.println(df.format(f)); }}
public static double siSheWuRu(double oldNumber) {
int i = (int)(oldNumber*100 + 0.5) ;
double d_return = ((double)i) / 100.0;
return d_return ;
}
import java.text.*;
public class Test6
{public static void main(String[] args)
{double d=3.1415926;
NumberFormat formatter=NumberFormat.getNumberInstance();
formatter.setMaximumFractionDigits(2);
String s =formatter.format(d);
System.out.println(s);
}
}