How to check a Float variable is empty or null IN JAVA

Question

I have a Float variable which is initialised from a function returning the Float value, and there can be chance to return null in some cases. So I need to check the value in the variable is null or empty. If the value is empty I need to initialise variable wb1 with value 1. I am using Java Spring. This is the code currently I amusing,

Float wb1 = !StringUtils.isEmpty(getArea())?getArea() : 1.0f;

What is the correct way to check and initilize with value 1.0f

`Float` is not a primitive type. `float` is a primitive type, but primitive types can't be empty or null. Unclear what you're asking. — user207421, Jun 05 '17 at 04:11
And the way to test if a non-primitive is null is `wb1 == null`. (This is basic Java 101 stuff. I suggest you read a Java tutorial ...) — Stephen C, Jun 05 '17 at 04:15

score 2 · Accepted Answer · answered Jun 05 '17 at 04:14

2

First: Float is an object and float is the primitive type.

null check is used for objects. For primitives you should use the default values check. For float the default value is 0.0f.

answered Jun 05 '17 at 04:14

Fady Saad

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score 0 · Answer 2 · answered Jun 05 '17 at 04:17

0

Assume you mean Float, the box of float, you can use

Optional.ofNullable(wbCalculation(area.getArea(), CitySizeByArea.SIZE1.value, area.getRate1(), task.getTaskId())).orElse(0f)

answered Jun 05 '17 at 04:17

f.khantsis

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How to check a Float variable is empty or null IN JAVA

2 Answers2