Java Guava | Floats.concat() method with Examples

Last Updated : 11 Jul, 2025
The concat() method of Floats Class in the Guava library is used to concatenate the values of many arrays into a single array. These float arrays to be concatenated are specified as parameters to this method.
For example: concat(new float[] {a, b}, new float[] {}, new float[] {c} returns the array {a, b, c}.
Syntax: 
public static float[] concat(float[]... arrays)
Parameter: This method accepts arrays as parameter which is the float arrays to be concatenated by this method. Return Value: This method returns a single float array which contains all the specified float array values in its original order. Below programs illustrate the use of concat() method: Example 1: Java 
// Java code to show implementation of
// Guava's Floats.concat() method

import com.google.common.primitives.Floats;
import java.util.Arrays;

class GFG {

    // Driver's code
    public static void main(String[] args)
    {

        // Creating 2 Float arrays
        float[] arr1 = { 1.2f, 2.3f, 3.5f, 4.4f, 5.1f };
        float[] arr2 = { 6.2f, 2.1f, 7.2f, 0.4f, 8.7f };

        // Using Floats.concat() method to combine
        // elements from both arrays into a single array
        float[] res = Floats.concat(arr1, arr2);

        // Displaying the single combined array
        System.out.println(Arrays.toString(res));
    }
}
Output: 
[1.2, 2.3, 3.5, 4.4, 5.1, 6.2, 2.1, 7.2, 0.4, 8.7]
Example 2: Java 
// Java code to show implementation of
// Guava's Floats.concat() method

import com.google.common.primitives.Floats;
import java.util.Arrays;

class GFG {

    // Driver's code
    public static void main(String[] args)
    {

        // Creating 4 Float arrays
        float[] arr1 = { 1.2f, 2.3f, 3.4f };
        float[] arr2 = { 4.5f, 5.6f };
        float[] arr3 = { 6.4f, 7.6f, 8.7f };
        float[] arr4 = { 9.7f, 0.8f };

        // Using Floats.concat() method to combine
        // elements from both arrays into a single array
        float[] res = Floats.concat(arr1, arr2, arr3, arr4);

        // Displaying the single combined array
        System.out.println(Arrays.toString(res));
    }
}
Output: 
[1.2, 2.3, 3.4, 4.5, 5.6, 6.4, 7.6, 8.7, 9.7, 0.8]
Reference : https://guava.dev/releases/19.0/api/docs/com/google/common/primitives/Floats.html#concat(float%5B%5D...)
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