Doubles is a utility class for primitive type double. It provides Static utility methods pertaining to double primitives, that are not already found in either Double or Arrays.
Declaration :
@GwtCompatible(emulated=true) public final class Doubles extends Object
Below table shows the Field summary for Guava Doubles Class :
Some of the methods provided by Guava Doubles Class are :
Exceptions :
- min : IllegalArgumentException if array is empty.
- max : IllegalArgumentException if array is empty.
- ensureCapacity : IllegalArgumentException if minLength or padding is negative.
- toArray : NullPointerException if collection or any of its elements is null.
Below table shows some other methods provided by Guava Doubles Class :
Below given are some examples showing the implementation of Guava Doubles Class methods :
Example 1 :
// Java code to show implementation// of Guava Doubles.asList() method import com.google.common.primitives.Doubles;import java.util.*; class GFG { // Driver method public static void main(String[] args) { double arr[] = { 2.6, 4.6, 1.2, 2.4, 1.5 }; // Using Doubles.asList() method which // converts array of primitives to array of objects List<Double> myList = Doubles.asList(arr); // Displaying the elements System.out.println(myList); }} |
Output :
[2.6, 4.6, 1.2, 2.4, 1.5]
Example 2 :
// Java code to show implementation// of Guava Doubles.toArray() method import com.google.common.primitives.Doubles;import java.util.*; class GFG { // Driver method public static void main(String[] args) { List<Double> myList = Arrays.asList(2.6, 4.6, 1.2, 2.4, 1.5); // Using Doubles.toArray() method which // converts a List of Doubles to an // array of double double[] arr = Doubles.toArray(myList); // Displaying the elements System.out.println(Arrays.toString(arr)); }} |
Output :
[2.6, 4.6, 1.2, 2.4, 1.5]
Example 3 :
// Java code to show implementation// of Guava Doubles.concat() method import com.google.common.primitives.Doubles;import java.util.*; class GFG { // Driver method public static void main(String[] args) { double[] arr1 = { 2.6, 4.6, 1.2 }; double[] arr2 = { 2.4, 1.5 }; // Using Doubles.concat() method which // combines arrays from specified // arrays into a single array double[] arr = Doubles.concat(arr1, arr2); // Displaying the elements System.out.println(Arrays.toString(arr)); }} |
Output :
[2.6, 4.6, 1.2, 2.4, 1.5]
Example 4 :
// Java code to show implementation// of Guava Doubles.contains() method import com.google.common.primitives.Doubles; class GFG { // Driver method public static void main(String[] args) { double[] arr = { 2.6, 4.6, 1.2, 2.4, 1.5 }; // Using Doubles.contains() method which // checks if element is present in array // or not System.out.println(Doubles.contains(arr, 2.5)); System.out.println(Doubles.contains(arr, 1.5)); }} |
output :
false true
Example 5 :
// Java code to show implementation// of Guava Doubles.min() method import com.google.common.primitives.Doubles; class GFG { // Driver method public static void main(String[] args) { double[] arr = { 2.6, 4.6, 1.2, 2.4, 1.5 }; // Using Doubles.min() method System.out.println(Doubles.min(arr)); }} |
Output :
1.2
Example 6 :
// Java code to show implementation// of Guava Doubles.max() method import com.google.common.primitives.Doubles; class GFG { // Driver method public static void main(String[] args) { double[] arr = { 2.6, 4.6, 1.2, 2.4, 1.5 }; // Using Doubles.max() method System.out.println(Doubles.max(arr)); }} |
Output :
4.6
