Java code number formatting

Question

Wonder if you could help me, I am a student and I've written an applet program for an assignment that creates an array of objects, each object has 3 elements. A string, another string, and a float. The float is multiplied with an integer in another method, and the resulting outputs a number which is the price of a "book". I need to format that result to show two decimal places, but when there is only one number I just get that number instead of the zero, for example if the result is 42.50 I just get 42.5. How do I get that last zero to show up, could you show me an example line of code for this number formatting? Thanks.
Tyler

Answer 1

Try to compile and see this piece of code.............I hope it meets ur requirement.
import java.math.BigDecimal;
public class Dec {
     public static void main(String s[]) {
     int decimalPlaces = 3;
     int a = 10;
     double b = 100.20000;
BigDecimal bd = new BigDecimal(a+b);
     // Truncates the big decimal value.
     bd = bd.setScale(decimalPlaces, BigDecimal.ROUND_DOWN);
     String string = bd.toString();
     System.out.println("ANswer"+string);
Regards,
Aru