String trim coming out with incorrect length

Question

I am using Java to determine the length of a double as part of a larger program. At this time the double is 666 but the length is returning as 5, which is a big problem. I read another question posted here with a solution but that didn't work for me. I will show my code and my attempt at emulating the previous solution with results. My original code: ``` double Real = 666; int lengthTest = String.valueOf(Real).trim().length(); System.out.println("Test: " + lengthTest); ``` This prints 5 Modifications that didn't work, and were essentially just breaking up the code into multiple lines. ``` double Real = 666; String part = Real + ""; part = part.trim(); int newLength = part.length(); System.out.println("new length : " + newLength); ``` This prints 5 as well. Obviously, I want this to print how many digits I have, in this case it should show 3. For a bigger picture if it helps I am breaking down number input into constituent parts, and making sure none of them exceed limits. ie: xx.yyezz…

Accepted Answer

That's because you are using a double.

```
String.valueOf(Real); // returns 666.0, i.e. length 5
```

Try casting it to an integer first:

```
Integer simple = (int) Real;
String.valueOf(simple); // returns 666, i.e. length 3.
```

String trim coming out with incorrect length

Solution

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