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
[…] is a method of Doubles Class in Guava Library which is used to return a hash code for a double value. The hashCode is an unique […]
[…] contains() method of Doubles Class in Guava library is used to check if a specified value is present in the specified array of double […]