Float class Methods in Java

java.lang.Float

The Float class wraps a value of primitive type float in an object. An object of type Float contains a single field whose type is float. In addition, this class provides several methods for converting a float to a String and a String to the float, as well as other constants and methods useful when dealing with the float.

Some methods of Float class

Float.BYTES: The number of bytes is used to represent a float value (i.e. 4).

Float.compare(): It compares the two specified float values.

Float.floatToIntBits(): It returns a representation of the specified floating-point value according to the IEEE 754 floating-point "single format" bit layout.

Float.floatToRawIntBits(): It returns a representation of the specified floating-point value according to the IEEE 754 floating-point "single format" bit layout, preserving Not-a-Number (NaN) values.

Float.hashCode(): It returns a hash code for a float value.

Float.intBitsToFloat(): It returns the float value corresponding to a given bit representation.

Float.isFinite(): It returns true if the argument is a finite floating-point value; returns false otherwise (for NaN and infinity arguments).

Float.isInfinite():  It returns true if the specified number is infinitely large in magnitude, false otherwise.

Float.isNaN(): It returns true if the specified number is a Not-a-Number (NaN) value, false otherwise.

Float.max(): It returns the greater of two float values.

Float.MAX_EXPONENT: Maximum exponent a finite float variable may have.

Float.MAX_VALUE: A constant holding the largest positive finite value of type float (i.e 3.4028235E38).

Float.min(): It returns the smaller of two float values.

Float.MIN_EXPONENT: Minimum exponent a normalized float variable may have (i.e. -126).

Float.MIN_NORMAL: A constant holding the smallest positive normal value of type float (i.e. 1.17549435E-38).

Float.NaN: A constant holding a Not-a-Number (NaN) value of type float (i.e. NaN)

Float.NEGATIVE_INFINITY: A constant holding the negative infinity of type float (i.e -Infinity).

Float.parseFloat(): It returns a new float initialized to the value represented by the specified String, as performed by the valueOf method of class Float.

Float.POSITIVE_INFINITY: A constant holding the positive infinity of type float (i.e. Infinity).

Float.SIZE: The number of bits used to represent a float value (i.e 32).

Float.sum(): It adds two float values together as per the + operator.

Float.toHexString(): It returns a hexadecimal string representation of the float argument.

Float.toString(): It returns a string representation of the float argument.

Float.valueOf(float f): It returns a Float instance representing the specified float value.

Float.valueOf(String s): It returns a Float object holding the float value represented by the argument string s.

Float.valueOf() String in Java

Float.valueOf(): This method is available in java.lang.Float class of Java.

Syntax:

Float java.lang.Float.valueOf(String s) throws NumberFormatException

This method takes one argument of type String as its parameter. This method returns a Float object holding the float value represented by the argument string s.

Note: If s is null, then a NullPointerException is thrown.

Parameters: One parameter is required for this method.

s: the string to be parsed.

Returns: a Float object holding the value represented by the String argument.

Throws: NumberFormatException - if the string does not contain a parsable number.

For Example:

String s = "1818.56"

Float.valueOf(s) = > It returns 1818.56 

Approach

Java

public class FloatValueofString {
    public static void main(String[] args) {

        String s = "1818.56";
        System.out.println(Float.valueOf(s));
    }
}

Output:

1818.56

Float.valueOf() in Java

Float.valueOf(): This method is available in java.lang.Float class of Java.

Syntax:

Float java.lang.Float.valueOf(float f)

This method takes one argument of type float as its parameter. This method returns a Float instance representing the specified float value.

Parameters: One parameter is required for this method.

f: a float value.

Returns: a Float instance representing f.

For Example:

float f = 188.7f

Float.valueOf(f) = > It returns 188.7

Approach

Java

public class FloatValueofFloat {
    public static void main(String[] args) {

        float f = 188.7f;
        System.out.println(Float.valueOf(f));

    }
}

Output:

188.7

Float.toString() in Java

Float.toString(): This method is available in java.lang.Float class of Java.

Syntax:

String java.lang.Float.toString(float f)

This method takes one argument of type float as its parameter. This method returns a string representation of the float argument.

Note:

1. If the argument is NaN, the result is the string"NaN".

2. Otherwise, the result is a string that represents the sign and magnitude (absolute value) of the argument.

Parameters: One parameter is required for this method.

f: the float to be converted.

Returns: a string representation of the argument.

For Example:

float f = 1919.5f

Float.toString(f) = > It returns 1919.5

Approach

Java

public class FloattoString {
    public static void main(String[] args) {

        float f = 1919.5f;
        System.out.println(Float.toString(f));

    }
}

Output:

1919.5

Float.toHexString() in Java

Float.toHexString(): This method is available in java.lang.Float class of Java.

Syntax:

String java.lang.Float.toHexString(float f)

This method takes one argument of type float as its parameter. This method returns a hexadecimal string representation of the float argument.

Note:

1. If the argument is NaN, the result is the string"NaN".

2. Otherwise, the result is a string that represents the sign and magnitude (absolute value) of the argument.

Parameters: One parameter is required for this method.

f: the float to be converted.

Returns: a hex string representation of the argument.

For Example:

float f = 19919.6f

Float.toHexString(f) = > It returns 0x1.373e66p14

Approach

Java

public class FloattoHexString {
    public static void main(String[] args) {

        float f = 19919.6f;
        System.out.println(Float.toHexString(f));

    }
}

Output:

0x1.373e66p14

Float.sum() in Java

Float.sum(): This method is available in java.lang.Float class of Java.

Syntax:

float java.lang.Float.sum(float a, float b)

This method takes two arguments of type float as its parameters. This method adds two float values together as per the + operator.

Parameters: Two parameters are required for this method.

a: the first operand.

b: the second operand.

Returns: The sum of a and b.

Approach

Java

public class FloatSum {
    public static void main(String[] args) {

        float a = 1919.6f, b = 9891.7f;
        System.out.println(Float.sum(a, b));

    }
}

Output:

11811.3

Float.SIZE in Java

Float.SIZE: This is available in java.lang.Float class of Java.

Syntax:

int java.lang.Float.SIZE

The number of bits used to represent a float value (i.e 32).

Approach

Java

public class FloatSize {
    public static void main(String[] args) {

        System.out.println(Float.SIZE);

    }
}

Output:

32

Float.POSITIVE_INFINITY in Java

Float.POSITIVE_INFINITY: This is available in java.lang.Float class of Java.

Syntax:

float java.lang.Float.POSITIVE_INFINITY

A constant holding the positive infinity of type float (i.e. Infinity).

Approach

Java

public class FloatPositiveInfinity {
    public static void main(String[] args) {

        System.out.println(Float.POSITIVE_INFINITY);

    }
}

Output:

Infinity

Float.parseFloat() in Java

Float.parseFloat(): This method is available in java.lang.Float class of Java.

Syntax:

float java.lang.Float.parseFloat(String s) throws NumberFormatException

This method takes one argument of type String as its parameter. This method returns a new float initialized to the value represented by the specified String, as performed by the valueOf method of class Float.

Parameters: One parameter is required for this method.

s: the string to be parsed.

Returns: the float value represented by the string argument.

Throws: NullPointerException - if the string is nullNumberFormatException - if the string does not contain a parsable float.

For Example:

String s = "1818.99"

Float.parseFloat(s) = > It returns 1818.99

Approach

Java

public class FloatparseFloat {
    public static void main(String[] args) {

        String s = "1818.99";
        System.out.println(Float.parseFloat(s));

    }
}

Output:

1818.99

Float.NEGATIVE_INFINITY in Java

Float.NEGATIVE_INFINITY: This is available in java.lang.Float class of Java.

Syntax:

float java.lang.Float.NEGATIVE_INFINITY

A constant holding the negative infinity of type float (i.e -Infinity).

Approach

Java

public class FloatNegativeInfinity {
    public static void main(String[] args) {

        System.out.println(Float.NEGATIVE_INFINITY);

    }
}

Output:

-Infinity

Float.NaN in Java

Float.NaN: This is available in java.lang.Float class of Java.

Syntax:

float java.lang.Float.NaN

A constant holding a Not-a-Number (NaN) value of type float (i.e. NaN)

Approach

Java

public class FloatNaN {
    public static void main(String[] args) {

        System.out.println(Float.NaN);

    }
}

Output:

NaN

Float.MIN_NORMAL in Java

Float.MIN_NORMAL: This is available in java.lang.Float class of Java.

Syntax:

float java.lang.Float.MIN_NORMAL

A constant holding the smallest positive normal value of type float (i.e. 1.17549435E-38).

Approach

Java

public class FloatMinNormal {
    public static void main(String[] args) {
        System.out.println(Float.MIN_NORMAL);
    }
}

Output:

1.17549435E-38

Float.MIN_EXPONENT in Java

Float.MIN_EXPONENT: This is available in java.lang.Float class of Java.

Syntax:

int java.lang.Float.MIN_EXPONENT

Minimum exponent a normalized float variable may have (i.e. -126).

Approach

Java

public class FloatMinExponent {
    public static void main(String[] args) {

        System.out.println(Float.MIN_EXPONENT);

    }
}

Output:

-126

Float.min() in Java

Float.min(): This method is available in java.lang.Float class of Java.

Syntax:

float java.lang.Float.min(float a, float b)

This method takes two arguments of type float as its parameters. This method returns the smaller of two float values.

Parameters: Two parameters are required for this method.

a: the first operand.

b: the second operand.

Returns: the smaller of a and b.

Approach

Java

public class FloatMin {
    public static void main(String[] args) {

        float a = 1919.56f, b = 1991.5f;
        System.out.println(Float.min(a, b));

    }
}

Output:

1919.56

Float.MAX_VALUE in Java

Float.MAX_VALUE: This is available in java.lang.Float class of Java.

Syntax:

float java.lang.Float.MAX_VALUE

A constant holding the largest positive finite value of type float (i.e 3.4028235E38).

Approach

Java

public class FloatMaxValue {
    public static void main(String[] args) {

        System.out.println(Float.MAX_VALUE);

    }
}

Output:

3.4028235E38

Float.MAX_EXPONENT in Java

Float.MAX_EXPONENT: This method is available in java.lang.Float class of Java.

Syntax:

int java.lang.Float.MAX_EXPONENT 

Maximum exponent a finite float variable may have.

Approach

Java

public class FloatMaxExponent {
    public static void main(String[] args) {

        System.out.println(Float.MAX_EXPONENT);

    }
}

Output:

127

Float.max() in Java

Float.max(): This method is available in java.lang.Float class of Java.

Syntax:

float java.lang.Float.max(float a, float b)

This method takes two arguments of type float as its parameters. This method returns the greater of two float values.

Parameters: Two parameters are required for this method.

a: the first operand.

b: the second operand.

Returns: the greater of a and b.

For Example:

float a = 1991.5f, b = 1991.119f

Float.max(a,b) = > It returns 1991.5

Approach

Java

public class FloatMax {
    public static void main(String[] args) {

        float a = 1991.5f, b = 1991.119f;
        System.out.println(Float.max(a, b));

    }
}

Output:

1991.5

Float.isNaN() in Java

Float.isNaN(): This method is available in java.lang.Float class of Java.

Syntax:

boolean java.lang.Float.isNaN(float v)

This method takes one argument of type float as its parameter. This method returns true if the specified number is a Not-a-Number (NaN) value, false otherwise.

Parameters: One parameter is required for this method.

v: the value to be tested.

Returns: true if the argument is NaN; false otherwise.

For Example:

float v = 177.9f

Float.isNaN(v) = > It returns false. 

Approach

Java

public class FloatisNaN {
    public static void main(String[] args) {

        float v = 177.9f;
        System.out.println(Float.isNaN(v));

    }
}

Output:

false

Float.isInfinite() in Java

Float.isInfinite(): This method is available in java.lang.Float class of Java.

Syntax:

boolean java.lang.Float.isInfinite(float v)

This method takes one argument of type float as its parameter. This method returns true if the specified number is infinitely large in magnitude, false otherwise.

Parameters: One parameter is required for this method.

v: the value to be tested.

Returns: true if the argument is positive infinity or negative infinity; false otherwise

For Example:

float v = 1919.9f

Float.isInfinite(v) = > It returns false.

Approach

Java

public class FloatisInfinite {
    public static void main(String[] args) {

        float v = 1919.9f;
        System.out.println(Float.isInfinite(v));

    }
}

Output:

false

Float.isFinite() in Java

Float.isFinite(): This method is available in java.lang.Float class of Java.

Syntax:

boolean java.lang.Float.isFinite(float f)

This method takes one argument of type float as its parameter. This method returns true if the argument is a finite floating-point value; returns false otherwise (for NaN and infinity arguments).

Parameters: One parameter is required for this method.

f: the float value to be tested.

Returns: true if the argument is a finite floating-point value, false otherwise.

For Example:

float f = (float) 199191.198

Float.isFinite(f) = > It returns true.

Approach

Java

public class FloatIsFinite {
    public static void main(String[] args) {

        float f = (float) 199191.198;
        System.out.println(Float.isFinite(f));

    }
}

Output:

true