Java Integer doubleValue() method

The doubleValue() method is a static method of Integer class under java.lang package. This method returns the value of this Integer as a double equivalent. This method is specified by Number class and may involve rounding or truncation.

Syntax

Following is the declaration of doubleValue() method:

Parameter:

DataType	Parameter	Description
NA	NA	This method does not accepts any parameter.

Returns:

The doubleValue() method returns the numeric value represented by this object after conversion to type double.

Exceptions:

Compatibility Version:

Java 1.2 and above

Example 1

public class IntegerDoubleValueExample1 {
	public static void main(String[] args) {
		// returns the Double value of this Double object
	      Double dobj = new Double("23.45");
	      double d = dobj.doubleValue();
	      System.out.println("Double value of the object is = " + d);	    
	      dobj = new Double("55");
	      d = dobj.doubleValue();
	      System.out.println("Double value of the object is = " + d);
	}
}

Test it Now

Output:

Double value of the object is = 23.45
Double value of the object is = 55.0

Example 2

import java.util.Scanner;
public class IntegerDoubleValueExample2 {
	public static void main(String[] args) {
		//Input your value
		System.out.print("Enter the Desired Value : ");
		Scanner sc = new Scanner(System.in);
            //Get value from user console
		int i = sc.nextInt();
		sc.close();
		Integer myValue = new Integer(i);
		double value = myValue.doubleValue();
		System.out.println("Double Value is: " + value);
	}
}

Output:

Enter the Desired Value : 45654
Double Value is: 45654.0

Example 3

import java.util.Scanner;
public class IntegerDoubleValueExample3 {
	public static void main(String[] args) {		
		System.out.print("Enter the Integer Value : ");
		Scanner sc = new Scanner(System.in);
            //Get value from user console
	      int i = sc.nextInt();
	      sc.close();
	      //number as integer
		Integer x = new Integer(i);
		//number as float
		Float y = new Float(64543735f);
		//print value as double
		System.out.println("X = "+ x.doubleValue());
		System.out.println("Y = " +y.doubleValue());
	}
}

Output:

Enter the Integer Value : 5745
X = 5745.0
Y = 6.4543736E7

Example 4

import java.math.BigInteger;
public class IntegerDoubleValueExample4 {
	public static void main(String[] args) {				    
	      //Declare and initialize our BigInteger values
	 	BigInteger obj1 = new BigInteger("452");
	 	BigInteger obj2 = new BigInteger("123233243564578");	
	 	//Get the double value of each BigInteger
	 	double dVal1 = obj1.doubleValue();
	 	double dVal2 = obj2.doubleValue();	 		
	 	//Print the operation
	 	System.out.println("The first object in double is = "+dVal1);
	 	System.out.println("The second object in double is = "+dVal2);    
	}
}

Test it Now

Output:

The first object in double is = 452.0
The second object in double is = 1.23233243564578E14

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Java Integer doubleValue() method

Syntax

Parameter:

Returns:

Exceptions:

Compatibility Version:

Example 1

Example 2

Example 3

Example 4

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