Java Float doubleValue() method

The doubleValue() method of Java Float class returns a double value corresponding to this Float Object by widening the primitive values or in simple words by directly converting it to double via doubleValue() method .

Syntax:

Parameters:

Return Value:

This method returns the double value which has been converted from the float value of this object.

Example 1

import java.lang.*;

public class FloatdoubleValueMethodExample1 {
 
  public static void main(String[] args) {

        float float_obj = 55.055F;

        Float float_obj1= new Float(float_obj);

        //widening the float object
        double double_obj= float_obj1.doubleValue();

        System.out.println("New value is = "+double_obj);
    }
}

Test it Now

Output:

New value is = 55.05500030517578

Example 2

import java.lang.*;

public class FloatdoubleValueMethodExample2 {

    public static void main(String[] args) {

        //passing negative integer
        float f1 = -5558979879798787667657678686875698796.63655768769857694f;
        Float f2= new Float(f1);
        System.out.println("Float value = "+f2);

        
       //Converting float into Double  
        Double d1= f2.doubleValue();
        System.out.println("Double value  = "+d1);
    }
}

Test it Now

Output:

Float value = -5.55898E36
Double value  = -5.558980006458046E36

Example 3

import java.lang.*;

public class FloatdoubleValueMethodExample3 {

    public static void main(String[] args) {

        float f1 = 96.67f;
        
        //Converting float into Double
        Double d1= f1.doubleValue();
       
        System.out.println("Double value  = "+d1);
    }
}

Test it Now

Output:

Error:(13, 22) java: float cannot be dereferenced

Here double is a primitive data type its object can't be used to call the Float class method. If done so it will give the above error.

Next TopicJava Float

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Java Float doubleValue() method

Syntax:

Parameters:

Return Value:

Example 1

Example 2

Example 3

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