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Number.doubleValue() method in java with examples

  • Last Updated : 20 Jun, 2018

The java.lang.Number.doubleValue() is an inbuilt method in java that returns the value of the specified number casted as a double data type. This may involve rounding or truncation.

Syntax:

public abstract double doubleValue()

Parameters: This method does not accepts any parameter.

Return value: This method returns the numeric value represented by this object after conversion to type double.

Below programs illustrate the Number.doubleValue()method:

Program 1:




// java program that demonstrates
// the Number.doubleValue()
public class gfg {
  
    public static void main(String[] args)
    {
  
        // number as integer
        Integer x = new Integer(1234785456);
        // print value as double
        System.out.println(x.doubleValue());
  
        // number as float
        Float y = new Float(98745876f);
        // print value as double
        System.out.println(y.doubleValue());
    }
}
Output:
1.234785456E9
9.8745872E7

Program 2:




// java program that demonstrates
// the Number.doubleValue()
  
public class gfg {
  
    public static void main(String[] args)
    {
  
        // number as integer
        Integer x = new Integer(123);
        // print value as double
        System.out.println(x.doubleValue());
  
        // number as float
        Float y = new Float(9876f);
        // print value as double
        System.out.println(y.doubleValue());
    }
}
Output:
123.0
9876.0

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