Java Double to String conversion without formatting

Question

I have the number 654987. Its an ID in a database. I want to convert it to a string. The regular Double.ToString(value) makes it into scientific form, 6.54987E5. Something I dont want.

Other formatting functions Ive found checks the current locale and adds appropriate thousand separators and such. Since its an ID, I cant accept any formatting at all.

How to do it?

[Edit] To clarify: Im working on a special database that treats all numeric columns as doubles. Double is the only (numeric) type I can retrieve from the database.

Solution 1

Use Long:

long id = 654987;
String str = Long.toString(id);

Solution 2

Use a fixed NumberFormat (specifically a DecimalFormat):

double value = getValue();
String str = new DecimalFormat("#").format(value);

alternatively simply cast to int (or long if the range of values it too big):

String str = String.valueOf((long) value);

But then again: why do you have an integer value (i.e. a "whole" number) in a double variable in the first place?

Solution 3

If it's an integer id in the database, use an Integer instead. Then it will format as an integer.

Solution 4

How about String.valueOf((long)value);

Solution 5

What about:

Long.toString(value)

or

new String(value)

View more solutions