Java Guava | Floats.toArray() method with Examples Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report 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 : Java // Java code to show implementation of // Guava's Floats.toArray() method import com.google.common.primitives.Floats; import java.util.Arrays; import java.util.List; class GFG { // Driver's code public static void main(String[] args) { // Creating a List of Floats List<Float> myList = Arrays.asList(1.2f, 2.3f, 3.4f, 4.5f, 5.6f); // Using Floats.toArray() method to convert // a List or Set of Float to an array of Float float[] arr = Floats.toArray(myList); // Displaying an array containing each // value of collection, // converted to a float value System.out.println(Arrays.toString(arr)); } } Output: [1.2, 2.3, 3.4, 4.5, 5.6] Example 2 : Java // Java code to show implementation of // Guava's Floats.toArray() method import com.google.common.primitives.Floats; import java.util.Arrays; import java.util.List; class GFG { // Driver's code public static void main(String[] args) { try { // Creating a List of Floats List<Float> myList = Arrays.asList(1.2f, 2.3f, 3.4f, null); // Using Floats.toArray() method // to convert a List or Set of Float // to an array of Float. // This should raise "NullPointerException" // as the collection contains "null" // as an element float[] arr = Floats.toArray(myList); // Displaying an array containing each // value of collection, // converted to a float value System.out.println(Arrays .toString(arr)); } catch (Exception e) { System.out.println(e); } } } Output: java.lang.NullPointerException Reference : https://guava.dev/releases/19.0/api/docs/com/google/common/primitives/Floats.html#toArray(java.util.Collection) Comment More info S Sahil_Bansall Follow Improve Article Tags : Java Java-Functions java-guava Guava-Functions Guava-Floats +1 More Explore Java BasicsIntroduction to Java4 min readJava Programming Basics9 min readJava Methods7 min readAccess Modifiers in Java6 min readArrays in Java9 min readJava Strings8 min readRegular Expressions in Java7 min readOOP & InterfacesClasses and Objects in Java10 min readAccess Modifiers in Java6 min readJava Constructors10 min readJava OOP(Object Oriented Programming) Concepts10 min readJava Packages7 min readJava Interface11 min readCollectionsCollections in Java12 min readCollections Class in Java13 min readCollection Interface in Java6 min readIterator in Java5 min readJava Comparator Interface6 min readException HandlingJava Exception Handling8 min readJava Try Catch Block4 min readJava final, finally and finalize4 min readChained Exceptions in Java3 min readNull Pointer Exception in Java5 min readException Handling with Method Overriding in Java4 min readJava AdvancedJava Multithreading Tutorial3 min readSynchronization in Java10 min readFile Handling in Java4 min readJava Method References9 min readJava 8 Stream Tutorial7 min readJava Networking15+ min readJDBC Tutorial5 min readJava Memory Management4 min readGarbage Collection in Java6 min readMemory Leaks in Java3 min readPractice JavaJava Interview Questions and Answers15+ min readJava Programs - Java Programming Examples8 min readJava Exercises - Basic to Advanced Java Practice Programs with Solutions5 min readJava Quiz | Level Up Your Java Skills1 min readTop 50 Java Project Ideas For Beginners and Advanced [Update 2025]15+ min read Like