Passing Bigdecimals

[Anil Karamchandan]

Hi,

I am performing some mathematical operations on the numbers/currency given by the user. I am making use of big decimal's here. However when I try to return the calculated value via my ajax api it gives me a parseerror and thus I converted the bigdecimal to string and then for some very large values I get 4E1 , 6E+4 etc getting displayed .

Can any one let me know how could I avoild this ? or the best method to calcualte the currencies.

thanks !

   

import java.util.*;
import java.text.*;
import java.math.*;

MathContext mc =  new MathContext(BigDecimal.ROUND_DOWN);
      
	Date dob = null;
	HashMap data = new HashMap();
	String ba = functionParams.get("basic_amount");
	
	BigDecimal basic_amount = new BigDecimal(ba,mc);
	String date_of_birth = functionParams.get("dob");
	
	String age_1 = functionParams.get("age");
	int age = Integer.parseInt(age_1);
	
	Double calc = (0.001417/2 *1.08);

	BigDecimal ee_premium = new BigDecimal(calc,mc);
	String e_premium = ee_premium.toString();
	data.put("ee_premium",e_premium);
	
	BigDecimal er_premium = basic_amount.multiply(ee_premium,mc);
	String r_premium = er_premium.toString();
	data.put("er_premium",r_premium);
	
	BigDecimal total_premium = ee_premium.add(er_premium,mc);
	String totalpremium = total_premium.toString();	
	data.put("total_premium",totalpremium);	
	
	BigDecimal ee_life_12_month = null;
	String eelife12month = "";
		if (age < 65)
		{
			String value = "12";
			BigDecimal period = new BigDecimal(value);	
			ee_life_12_month = ee_premium.multiply(period,mc);
			eelife12month = ee_life_12_month.toString(); 
			data.put("ee_life_12_month",eelife12month);
		}
		if (age == 65)
		{
			Calendar today = Calendar.getInstance();
			Calendar cal_age = Calendar.getInstance();
			cal_age.setTime(dob);
			int todaymonth = today.get(Calendar.MONTH);
			int agemonth  =  cal_age.get(Calendar.MONTH);
			int difference = (agemonth - todaymonth);
			if (difference == 0)
				{
					ee_life_12_month = new BigDecimal(0);
					eelife12month = ee_life_12_month.toString(); 
					data.put("ee_life_12_month",eelife12month);

				}
			if (difference > 0)
				{
					ee_life_12_month = ee_premium.multiply(new BigDecimal(difference),mc);			
					eelife12month = ee_life_12_month.toString(); 
					data.put("ee_life_12_month",eelife12month);				}	
	}
return data;
 

[Campbell Ritchie]

How are you displaying the BigDecimal?

And I don't think that code will compile because there aren't enough {}: please read this.

[Anil Karamchandan]

hi,

The code does compile fine, this is the real code, I am using an SAAS application which has the provision of inserting your own code which complies once you save it. I am displaying my code on a text field of type currency, I also tried to change this to a normal textfield type but still I am not able to display it correctly. When I try to print the code once I have done some calculations for some of the fields it displays as 322222 10E calcs while for other it does not.

The point is how do I display bigdecimal on the screen for the user ? the field should be of which type ?

[Wouter Oet]

The code doesn't compile because the functionality is not in a class and not in a function. Maybe something went wrong while copying it? I would recommend you to refactor this function into smaller functions, use generics for your HashMap and replace the magic numbers.

But we need more information to help you. So to repeat Campbell: How are you displaying the BigDecimal? Because currently you're only putting the bigDecimal.toString() into the HashMap.