How to extract double value with the same format from String in java?

Question

i have one string including double value. Now i want to extract same value as double value. i.e. String val = "0.0001";

Now when i am extracting this value as double, it changes it's format i.e. 1.0E-4 using code: double valAsDouble = new Double(val);

I also want to extract the same value as long and bigdecimal format with the same format.

Please suggest me that how to get it?

`double`s don't have a format. What you're describing is the result of the round-trip `String->double->String`. It's imprecise. — user207421, Feb 22 '17 at 10:01
What is your problem? whether you use 1.0E-4 * 10000 or you use 0.0001 * 10000 the result is always going to be the same. — Blip, Feb 22 '17 at 14:57

score 1 · Answer 1 · answered Feb 22 '17 at 10:05

The double is just a Java representation, the format does not matter at all.

When you are going to print this number and you need a particular layout you can easily change it using String.format.

Here you can find the documentation about it.

For example maybe in your case this could be a good solution

String myFormattedRepresentation = String.format("%1$,.2f", myDouble);

1 Answers1