Java - Float doubleValue() method



Description

The Java Float doubleValue() method returns the double value of this Float object.

Declaration

Following is the declaration for java.lang.Float.doubleValue() method

public double doubleValue()

Parameters

NA

Return Value

This method returns the double value represented by this object.

Exception

NA

Example 1

The following example shows the usage of Float doubleValue() method to get a double primitive value of given positive Float object. We've initialized a Float object with a given positive float value. Then using doubleValue() method, we're printing its value.

package com.tutorialspoint;
public class FloatDemo {
   public static void main(String[] args) {
      Float f = new Float("15.30");
   
      //return the double value
      System.out.println("Value = " + f.doubleValue());
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

Value = 15.300000190734863

Example 2

The following example shows the usage of Float doubleValue() method to get a double primitive value of given negative Float object. We've initialized a Float object with a given positive float value. Then using doubleValue() method, we're printing its value.

package com.tutorialspoint;
public class FloatDemo {
   public static void main(String[] args) {
      Float f = new Float("-15.30");
   
      //return the double value
      System.out.println("Value = " + f.doubleValue());
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

Value = -15.300000190734863

Example 3

The following example shows the usage of Float doubleValue() method to get a double primitive value of given negative Float object of zero value. We've initialized a Float object with a given negative zero value. Then using doubleValue() method, we're printing its value.

package com.tutorialspoint;
public class FloatDemo {
   public static void main(String[] args) {
      Float f = new Float("-0.0");
   
      //return the double value
      System.out.println("Value = " + f.doubleValue());
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

Value = -0.0

Example 4

The following example shows the usage of Float doubleValue() method to get a double primitive value of given positive Float object of zero value. We've initialized a Float object with a given positive zero value. Then using doubleValue() method, we're printing its value.

package com.tutorialspoint;
public class FloatDemo {
   public static void main(String[] args) {
      Float f = new Float("+0.0");
   
      //return the double value
      System.out.println("Value = " + f.doubleValue()); 
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

Value = 0.0
java_lang_float.htm
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