How to convert string to double ..please help

[shiniskumar]

How to convert string to double?

Ive got a double variable dTot;
its value is 5.037717235E7
when i did FreemarkerTools .formatDecimal( dTot) i got it as string "50377172.3 5".

now i want to pass it as a double value to the method format() which is shown below.
when i do Double.parseDou ble i get dTot as 5.037717235E7
CurrencyConvert er.format(Doubl e.parseDouble(F reemarkerTools. formatDecimal(d Tot)));



what else can i do to pass it as 50377172.35 to the method format()







public class CurrencyConvert er {

public static String format(double n) {
if(n<0)
return "("+formatAcc(M ath.abs(n))+")" ;


return formatAcc(n);
}

public static String formatAcc(doubl e n){
//long decPart=0;
String s1 = ""+n;
String[] nums = s1.split("\\.") ;
long decPart = Integer.parseIn t(nums[1]);


// long decPart = (long) ((n-Math.floor(n))* 100);


if(n==0)
return "0.00";

int arr[] = new int[] { 1000, 100, 100, 100, 100, 100 };
String arrFromat[] = new String[] { "000", "00", "00", "00", "00",
"00" };
String s = "";
for (int i = 0; i < arr.length; i++) {
long x = (long) (n % arr[i]);
if (s.length() > 0)
s = "," + s;
n = n / arr[i];

if (n < 1) {
s = x + s;
break;
} else {
s = format(x, arrFromat[i]) + s;
}
}

return s+"."+format(de cPart,"00");
}


private static String format(long n, String format) {
String temp = n + "";
temp = format.substrin g(temp.length() ) + temp;
return temp;
}

public static void main(String[] args) {
System.out.prin tln(CurrencyCon verter.format(5 54406000.40));
}
}

[r035198x]

How to convert string to double?

Ive got a double variable dTot;
its value is 5.037717235E7
when i did FreemarkerTools .formatDecimal( dTot) i got it as string "50377172.3 5".

now i want to pass it as a double value to the method format() which is shown below.
when i do Double.parseDou ble i get dTot as 5.037717235E7
CurrencyConvert er.format(Doubl e.parseDouble(F reemarkerTools. formatDecimal(d Tot)));



what else can i do to pass it as 50377172.35 to the method format()







public class CurrencyConvert er {

public static String format(double n) {
if(n<0)
return "("+formatAcc(M ath.abs(n))+")" ;


return formatAcc(n);
}

public static String formatAcc(doubl e n){
//long decPart=0;
String s1 = ""+n;
String[] nums = s1.split("\\.") ;
long decPart = Integer.parseIn t(nums[1]);


// long decPart = (long) ((n-Math.floor(n))* 100);


if(n==0)
return "0.00";

int arr[] = new int[] { 1000, 100, 100, 100, 100, 100 };
String arrFromat[] = new String[] { "000", "00", "00", "00", "00",
"00" };
String s = "";
for (int i = 0; i < arr.length; i++) {
long x = (long) (n % arr[i]);
if (s.length() > 0)
s = "," + s;
n = n / arr[i];

if (n < 1) {
s = x + s;
break;
} else {
s = format(x, arrFromat[i]) + s;
}
}

return s+"."+format(de cPart,"00");
}


private static String format(long n, String format) {
String temp = n + "";
temp = format.substrin g(temp.length() ) + temp;
return temp;
}

public static void main(String[] args) {
System.out.prin tln(CurrencyCon verter.format(5 54406000.40));
}
}

Like I already pointed out before, change your method

 public static String format(double n) {

to

 public static String format(String n) {

Everything will become much easier then.

[shiniskumar]

Like I already pointed out before, change your method

 public static String format(double n) {

to

 public static String format(String n) {

Everything will become much easier then.

But im doing a lot of calculations withg that double value inside format().
How do i do the calculations with string?

Please c the code given

[r035198x]

But im doing a lot of calculations withg that double value inside format().
How do i do the calculations with string?

Please c the code given

Inside the format method you can then convert back to your double using parseDouble so that you now have your value both as a string and as a double inside that method

 format(String s) { 
    double doubleValue = Double.parseDouble(s);
    //If strin value is required, use s
    //If double value is required, use doubleValue
    //... 
 

[shiniskumar]

Inside the format method you can then convert back to your double using parseDouble so that you now have your value both as a string and as a double inside that method

 format(String s) { 
    double doubleValue = Double.parseDouble(s);
    //If strin value is required, use s
    //If double value is required, use doubleValue
    //... 
 

Still i have the same problem.
When i get a string in format() as "50377172.3 5"
when parsing it i get 5.037717235E7
in the method format(), im calling another method formatAcc() where im splitting the number into 2 and taking Integer.parseIn t() of the decimal part.
Trying to parse it, i get NumberFormatExc eption...

Please help me recover frm this

[r035198x]

Still i have the same problem.
When i get a string in format() as "50377172.3 5"
when parsing it i get 5.037717235E7
in the method format(), im calling another method formatAcc() where im splitting the number into 2 and taking Integer.parseIn t() of the decimal part.
Trying to parse it, i get NumberFormatExc eption...

Please help me recover frm this

Look at your design again formatAcc() is the one that needs to split the value right? So formatAcc() needs the String value so it can use the split method on that value.

[shiniskumar]

Look at your design again formatAcc() is the one that needs to split the value right? So formatAcc() needs the String value so it can use the split method on that value.

This is the formatAcc() method.
public static String formatAcc(doubl e n){
//long decPart=0;
String s1 = ""+n;
String[] nums = s1.split("\\.") ;
long decPart = Integer.parseIn t(nums[1]);


// long decPart = (long) ((n-Math.floor(n))* 100);


if(n==0)
return "0.00";

int arr[] = new int[] { 1000, 100, 100, 100, 100, 100 };
String arrFromat[] = new String[] { "000", "00", "00", "00", "00",
"00" };
String s = "";
for (int i = 0; i < arr.length; i++) {
long x = (long) (n % arr[i]);
if (s.length() > 0)
s = "," + s;
n = n / arr[i];

if (n < 1) {
s = x + s;
break;
} else {
s = format(x, arrFromat[i]) + s;
}
}

return s+"."+format(de cPart,"00");
}
Even if i pass the number n as string, im doing calculations inside this function, not only splitting. and if i make it as string and convert it to double, i get exceptions

[r035198x]

This is the formatAcc() method.
public static String formatAcc(doubl e n){
//long decPart=0;
String s1 = ""+n;
String[] nums = s1.split("\\.") ;
long decPart = Integer.parseIn t(nums[1]);


// long decPart = (long) ((n-Math.floor(n))* 100);


if(n==0)
return "0.00";

int arr[] = new int[] { 1000, 100, 100, 100, 100, 100 };
String arrFromat[] = new String[] { "000", "00", "00", "00", "00",
"00" };
String s = "";
for (int i = 0; i < arr.length; i++) {
long x = (long) (n % arr[i]);
if (s.length() > 0)
s = "," + s;
n = n / arr[i];

if (n < 1) {
s = x + s;
break;
} else {
s = format(x, arrFromat[i]) + s;
}
}

return s+"."+format(de cPart,"00");
}
Even if i pass the number n as string, im doing calculations inside this function, not only splitting. and if i make it as string and convert it to double, i get exceptions

Like I said previously, give it a String. Then you create another variable, the double, that use for calculations that require the double. Just pass Strings to all your functions and where a double is required use parseDouble.

[shiniskumar]

Like I said previously, give it a String. Then you create another variable, the double, that use for calculations that require the double. Just pass Strings to all your functions and where a double is required use parseDouble.

That is where the problem is. i pass the arguments using String, then convert it into double for calculations. it works well for small numbers. But for big numbers, using parseDouble gives the exponential value. so i cant get the correct double value for calculations.

ie if my string is "55440600.4 0" using parseDouble i get 5.544060040E7
how can i use this value for calculations.?

[r035198x]

That is where the problem is. i pass the arguments using String, then convert it into double for calculations. it works well for small numbers. But for big numbers, using parseDouble gives the exponential value. so i cant get the correct double value for calculations.

ie if my string is "55440600.4 0" using parseDouble i get 5.544060040E7
how can i use this value for calculations.?

Use it like that for calculations. You will get the correct result.

Which calculation are you getting problems with it?