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Guava - Floats Class
Floats is a utility class for primitive type float.
Class Declaration
Following is the declaration for com.google.common.primitives.Floats class −
@GwtCompatible(emulated = true) public final class Floats extends Object
Fields
Sr.No | Field & Description |
---|---|
1 |
static int BYTES The number of bytes required to represent a primitive float value. |
Methods
Sr.No | Method & Description |
---|---|
1 |
static List<Float> asList(float... backingArray) Returns a fixed-size list backed by the specified array, similar to Arrays.asList(Object[]). |
2 |
static int compare(float a, float b) Compares the two specified float values using Float.compare(float, float). |
3 |
static float[] concat(float[]... arrays) Returns the values from each provided array combined into a single array. |
4 |
static boolean contains(float[] array, float target) Returns true if target is present as an element anywhere in array. |
5 |
static float[] ensureCapacity(float[] array, int minLength, int padding) Returns an array containing the same values as the array, but guaranteed to be of a specified minimum length. |
6 |
static int hashCode(float value) Returns a hash code for value; equal to the result of invoking ((Float) value).hashCode(). |
7 |
static int indexOf(float[] array, float target) Returns the index of the first appearance of the value target in array. |
8 |
static int indexOf(float[] array, float[] target) Returns the start position of the first occurrence of the specified target within array, or -1 if there is no such occurrence. |
9 |
static boolean isFinite(float value) Returns true if value represents a real number. |
10 |
static String join(String separator, float... array) Returns a string containing the supplied float values, converted to strings as specified by Float.toString(float), and separated by separator. |
11 |
static int lastIndexOf(float[] array, float target) Returns the index of the last appearance of the value target in array. |
12 |
static Comparator<float[]> lexicographicalComparator() Returns a comparator that compares two float arrays lexicographically. |
13 |
static float max(float... array) Returns the greatest value present in array, using the same rules of comparison as Math.min(float, float). |
14 |
static float min(float... array) Returns the least value present in array, using the same rules of comparison as Math.min(float, float). |
15 |
static Converter<String,Float> stringConverter() Returns a serializable converter object that converts between strings and floats using Float.valueOf(java.lang.String) and Float.toString(). |
16 |
static float[] toArray(Collection<? extends Number> collection) Returns an array containing each value of collection, converted to a float value in the manner of Number.floatValue(). |
17 |
static Float tryParse(String string) Parses the specified string as a single-precision floating point value. |
Methods Inherited
This class inherits methods from the following class −
- java.lang.Object
Example of Floats class
Create the following java program using any editor of your choice in say C:/> Guava.
GuavaTester.java
import java.util.List; import com.google.common.primitives.Floats; public class GuavaTester { public static void main(String args[]) { GuavaTester tester = new GuavaTester(); tester.testFloats(); } private void testFloats() { float[] floatArray = {1.0f,2.0f,3.0f,4.0f,5.0f,6.0f,7.0f,8.0f,9.0f}; //convert array of primitives to array of objects List<Float> objectArray = Floats.asList(floatArray); System.out.println(objectArray.toString()); //convert array of objects to array of primitives floatArray = Floats.toArray(objectArray); System.out.print("[ "); for(int i = 0; i< floatArray.length ; i++) { System.out.print(floatArray[i] + " "); } System.out.println("]"); //check if element is present in the list of primitives or not System.out.println("5.0 is in list? " + Floats.contains(floatArray, 5.0f)); //return the index of element System.out.println("5.0 position in list " + Floats.indexOf(floatArray, 5.0f)); //Returns the minimum System.out.println("Min: " + Floats.min(floatArray)); //Returns the maximum System.out.println("Max: " + Floats.max(floatArray)); } }
Verify the Result
Compile the class using javac compiler as follows −
C:\Guava>javac GuavaTester.java
Now run the GuavaTester to see the result.
C:\Guava>java GuavaTester
See the result.
[1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0] [ 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 ] 5.0 is in list? true 5.0 position in list 4 Min: 1.0 Max: 9.0