The doubleValue() method returns the value of this Integer as double after performing widening primitive conversion.
Hierarchy:
java.lang Package
-> Integer Class
-> doubleValue() Method
Syntax of doubleValue() method
public double doubleValue()
doubleValue() Parameters
NA
doubleValue() Return Value
- A double data type value equivalent to the value of this Integer object numerically.
Supported java versions: Java 1.2 and onwards.
Example 1
public class JavaExample {
public static void main(String[] args) {
Integer i = new Integer("55");
Integer i2 = new Integer(97);
double d = i.doubleValue();
double d2 = i2.doubleValue();
System.out.println("Value of Integer i as double: "+d);
System.out.println("Value of Integer i2 as double: "+d2);
}
}
Output:
Example 2
public class JavaExample {
public static void main(String[] args) {
int num = 100; //primitive int
Integer i = new Integer(num); //int to Integer object
double d = i.doubleValue();
System.out.println("Value of num as double: "+d);
}
}
Output:
Example 3
import java.util.Scanner;
public class JavaExample{
public static void main(String[] args){
Integer i;
Scanner scan = new Scanner(System.in);
System.out.print("Enter first int number: ");
i = scan.nextInt();
double val = i.doubleValue();
System.out.println("Entered value as double: "+val);
}
}
Output:
