Converting String to Double

[Former Member]

Hello,

I am trying to convert a string to double as:

double d= Doubel.parseDouble(String)

but at runtime it is giving NumberFormatException ....

how do we convert String to Double else....

Any help would be highly appreciated.

[Former Member]

Sridhar,

I tried the code although it's changing the value according to my calculations still it doesen't change the value on the screen where I am trying for...

Looking forward to your reply.

[sridhar_k2]

I am not sure with your logic. You can print String before you set it to the Context.

like this,

Make sure your QuotasElement Cardinality 1.n.

String str2 = null;

try

{

for(int i=0;i<str.length();i++)

{

char c =str.charAt(i);

if(c!=' '&& c><65)

final_str=final_str+c;

}

double balance =Double.parseDouble(final_str);

balance = balance + addition;

str2 = Double.toString(balance);

wdComponentAPI.getMessageManager().reportSuccess("str2 : "+str2 );

}

catch(Exception e)

{

e.printStackTrace();

}

wdContext.currentQuotasElement().setRest_Posted_Requested(str2);

Regards,

Sridhar

[Former Member]

Hello Sridhar,

When I debug it I see the new value but some how it's not setting the Context Model attribute since it is a Model Attribute it does not have a cardinality property....

Thanks

[sridhar_k2]

I Dont see any wrong in your code. I would check the value before setting it to the context element. Check in the rest of your program, any where you are setting it to null.

Check one more time, is it setting correct values like this.

String str2 = null;

try

{

for(int i=0;i<str.length();i++)

{

char c =str.charAt(i);

if(c!=' '&& c><65)

final_str=final_str+c;

}

double balance =Double.parseDouble(final_str);

balance = balance + addition;

str2 = Double.toString(balance);

wdComponentAPI.getMessageManager().reportSuccess("str2 : "+str2 );

}

catch(Exception e)

{

e.printStackTrace();

}

wdContext.currentQuotasElement().setRest_Posted_Requested(str2);

wdComponentAPI.getMessageManager().reportSuccess("str2 : "+str2 );

Are you getting any exception, or is it setting null to your context element?

Regards,

Sridhar

[Former Member]

Hello Sridhar,

The statement

wdComponentAPI.getMessageManager().reportSuccess("str2 : "+str2 );

prints the right modified value on the top but it's just not getting reflected in the Table field....and I am not setting it to null.

Please help.

Message was edited by:

SubhashTripathi

[sridhar_k2]

Subhash,

I am not clear with your business logic. You want to convert String to Double, and you are converting that double value to String.

I have a Node - TestValueNode

- attribute1

- attribute2

String str = "123";

String str2 = null;

double d = 0.0;

try{

double d= Double.parseDouble(str); // this contains the double value

str2 = Double.toString(d); // this contains the String value same as 'str'

wdContext.currentTestValueNodeElement().setAttribute1(str2);

}catch(NumberFormatException nfe){

}

Write me back about your exact requirement. I can probably help you.

Regards,

Sridhar

[Former Member]

No...No what I want to do is fetch a String from the Context ...convert it to a Double value ...perform some calculations on it ...convert it back to string again and set it to a context variable...

Looking forward to your reply.

[Former Member]

Hi,

Assume you have a context value attribute called value of type String. You will read this String value>Convert it to double>Perform an increment operation-->Convert back to String.

String str = wdContext.currentContextElement().getValue();//eg."123"

double d = Double.parseDouble(str);// converted to 123.0

d = d+1;//124.0

wdContext.currentContextElement.setValue(Double.toString(d));//"124.0"

wdComponentAPI.getMessageManager().reportSuccess(wdContext.currentContextElement().getValue());

Warm Regards,

Murtuza

Warm Regards,

Murtuza

[Former Member]

Hello Murtuza,

Thanks for the reply. I am also doing the same thing and when I try to print it ...it show me th eright value but when I set it to the Context variable ...it does not work.

Looking forward to your reply.

[sridhar_k2]

Subhash,

If you are getting correct value in both places print 1 and print 2, check your table cell, whether it is correctly mapped to the context element or not?

If table cell is binded to the context element, it should show the value. there no other mistakes, i couldn't see in your code.

String str = wdContext.currentContextElement().getValue();//eg.

wdComponentAPI.getMessageManager().reportSuccess(wdContext.currentContextElement().getValue()); - "123" - <b>Print 1</b>

double d = Double.parseDouble(str);// converted to 123.0

d = d+1;//124.0

wdContext.currentContextElement.setValue(Double.toString(d));//"124.0"

wdComponentAPI.getMessageManager().reportSuccess(wdContext.currentContextElement().getValue()); - <b>Print 2</b>

Regards,

Sridhar

[Former Member]

Hi Subhash,

wdComponentAPI.getMessageManager().reportSuccess(wdContext.currentContextElement().getValue());

The above line prints the value in the context itself and for me it printed the correct output.

Regards,

Murtuza