Java - Integer Class doubleValue() Method

Integer class doubleValue() method: Here, we are going to learn about the doubleValue() method of Integer class with its syntax and example. By Preeti Jain Last updated : March 18, 2024

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();

Parameters

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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