Java Guava | Floats.toArray() method with Examples
The toArray() method of Floats Class in the Guava library is used to convert the float values, passed as the parameter to this method, into a Float Array. These float values are passed as a Collection to this method. This method returns a Float array.
Syntax:
public static float[] toArray(Collection<? extends Number> collection)
Parameters: This method accepts a mandatory parameter collection which is the collection of float values to be converted in to a Float array.
Return Value: This method returns a float array containing the same values as a collection, in the same order.
Exceptions: This method throws NullPointerException if the passed collection or any of its elements is null.
Below programs illustrate the use of toArray() method:
Example 1 :
import com.google.common.primitives.Floats;
import java.util.Arrays;
import java.util.List;
class GFG {
public static void main(String[] args)
{
List<Float> myList
= Arrays.asList( 1 .2f, 2 .3f, 3 .4f, 4 .5f, 5 .6f);
float [] arr = Floats.toArray(myList);
System.out.println(Arrays.toString(arr));
}
}
|
Output:
[1.2, 2.3, 3.4, 4.5, 5.6]
Example 2 :
import com.google.common.primitives.Floats;
import java.util.Arrays;
import java.util.List;
class GFG {
public static void main(String[] args)
{
try {
List<Float> myList
= Arrays.asList( 1 .2f, 2 .3f, 3 .4f, null );
float [] arr = Floats.toArray(myList);
System.out.println(Arrays
.toString(arr));
}
catch (Exception e) {
System.out.println(e);
}
}
}
|
Output:
java.lang.NullPointerException
Reference : https://google.github.io/guava/releases/19.0/api/docs/com/google/common/primitives/Floats.html#toArray(java.util.Collection)
Last Updated :
31 Jan, 2019
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