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Java Integer class doubleValue() method with example

Integer class doubleValue() method: Here, we are going to learn about the doubleValue() method of Integer class with its syntax and example.
Submitted by Preeti Jain, on September 25, 2019

Integer class doubleValue() method

  • doubleValue() method is available in java.lang package.
  • doubleValue() method is used to return the value denoted by this Integer object converted to type double (by casting).
  • doubleValue() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • doubleValue() method does not throw an exception at the time of conversion from Integer to double.

Syntax:

    public double doubleValue();

Parameter(s):

  • It does not accept any parameter.

Return value:

The return type of this method is double, it returns a converted (from type Integer to double) value represented by this Integer object.

Example:

// Java program to demonstrate the example 
// of doubleValue() method of Integer class

public class DoubleValueOfIntegerClass {
    public static void main(String[] args) {
        // Variables initialization
        int i1 = 20;
        int i2 = 30;

        // It returns double value denoted by this Integer ob1 object
        // and converted to a double by calling ob1.doubleValue()
        Integer ob1 = new Integer(i1);

        // Display ob1 result
        System.out.println("ob1.doubleValue(): " + ob1.doubleValue());

        // It returns double value denoted by this Integer ob2 object
        // and converted to a double by calling ob2.doubleValue()
        Integer ob2 = new Integer(i2);

        // Display ob2 result
        System.out.println("ob2.doubleValue(): " + ob2.doubleValue());
    }
}

Output

ob1.doubleValue(): 20.0
ob2.doubleValue(): 30.0





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