The Double.shortValue()
method in Java is used to convert a Double
object to a short
primitive.
Table of Contents
- Introduction
shortValue()
Method Syntax- Examples
- Converting a
Double
toshort
- Handling Large Values
- Handling
null
Values
- Converting a
- Real-World Use Case
- Conclusion
Introduction
The Double.shortValue()
method is an instance method in the Double
class in Java. It converts a Double
object to a short
primitive. This method is useful when you need to narrow down a Double
to a short
for certain operations or storage, bearing in mind that this conversion may lead to loss of precision or overflow.
shortValue()() Method Syntax
The syntax for the Double.shortValue()
method is as follows:
public short shortValue()
The method returns:
- The
short
value represented by thisDouble
object.
Examples
Converting a Double
to short
The shortValue()
method can be used to convert a Double
object to a short
primitive.
Example
public class DoubleToShortExample {
public static void main(String[] args) {
Double doubleObject = 123.45;
short shortValue = doubleObject.shortValue();
System.out.println("Short value of 123.45: " + shortValue);
}
}
Output:
Short value of 123.45: 123
In this example, the Double
object 123.45
is converted to the short
primitive 123
.
Handling Large Values
When converting large Double
values, the shortValue()
method may result in overflow and wrap around.
Example
public class LargeDoubleToShortExample {
public static void main(String[] args) {
Double doubleObject = 32768.0; // Larger than Short.MAX_VALUE
short shortValue = doubleObject.shortValue();
System.out.println("Short value of 32768.0: " + shortValue);
}
}
Output:
Short value of 32768.0: -32768
In this example, the Double
value 32768.0
exceeds the range of the short
type (which is -32768 to 32767), resulting in a wrap-around value of -32768
.
Handling null
Values
When dealing with Double
objects, it’s important to handle null
values to avoid NullPointerException
.
Example
public class NullHandlingExample {
public static void main(String[] args) {
Double doubleObject = null;
if (doubleObject != null) {
short shortValue = doubleObject.shortValue();
System.out.println("Short value: " + shortValue);
} else {
System.out.println("The Double object is null.");
}
}
}
Output:
The Double object is null.
In this example, the code checks if the Double
object is null
before attempting to convert it to a short
primitive.
Real-World Use Case
Converting User Input
In a real-world application, you might need to convert user input, which is often in the form of Double
objects, to short
primitives for calculations.
Example
import java.util.Scanner;
public class UserInputExample {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter a number: ");
Double doubleObject = scanner.nextDouble();
short shortValue = doubleObject.shortValue();
short result = (short) (shortValue * 2);
System.out.println("The result of doubling the input is: " + result);
scanner.close();
}
}
Output (example input 123.45):
Enter a number:
The result of doubling the input is: 246
In this example, the user input is read as a Double
object and then converted to a short
primitive for a calculation.
Conclusion
The Double.shortValue()
method in Java is a straightforward way to convert Double
objects to short
primitives. By understanding how to use this method, you can efficiently handle tasks that involve converting Double
objects to short
primitives in your Java applications. Whether you are performing arithmetic operations, handling large values, or avoiding null
values, the shortValue()
method provides a reliable solution for these tasks.