Float Class in Java

Updated:

–

By

Coder Sathi

The Float class in Java is a wrapper class for the primitive data type float. It provides a number of methods for converting between float and String, as well as other useful methods for working with floating-point numbers.

Following is a quick overview of some of the key features of the Float class:

Constructors

The Float class has two constructors:

ConstructorDescription
Float(float value)Creates a new Float object with the specified value.
Float(String value)Creates a new Float object with the value represented by the specified string.

Methods

The Float class has a number of methods for working with floating-point numbers. Some of them are listed below:

MethodDescription
floatValue()Returns the primitive float value of the Float object.
toString()Returns a string representation of the Float object.
parseFloat(String str)Parses the specified string and returns a new Float object with the parsed value.
isNaN()Returns true if the specified float value is NaN (Not a Number).
isInfinite()Returns true if the specified float value is infinite.

Following is a simple example of how to use the Float class:

public class FloatDemo {

    public static void main(String[] args) {
        float f = 10.5f;
        Float fObj = new Float(f);

        System.out.println("f: " + f);
        System.out.println("fObj: " + fObj);

        String str = "12.34";
        Float f2 = Float.parseFloat(str);
        System.out.println("f2: " + f2);

        if (Float.isNaN(f2)) {
            System.out.println("f2 is NaN");
        } else if (Float.isInfinite(f2)) {
            System.out.println("f2 is infinite");
        } else {
            System.out.println("f2 is a finite number");
        }
    }
}

This code will print the following output:

f: 10.5
fObj: 10.5
f2: 12.34
f2 is a finite number

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