public class Employee {
private int employeeId;
private String firstName;
private String lastName;
private double salary;
public Employee(int employeeId, String firstName, String lastName, double salary) {
this.employeeId = employeeId;
this.firstName = firstName;
this.lastName = lastName;
this.salary = salary;
}
public int getEmployeeId() {
return employeeId;
}
public void setEmployeeId(int employeeId) {
this.employeeId = employeeId;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
}
Say you have an Object of class Employee and you want to convert it into a type Optional, then follow the below code.
import java.util.Optional;
public class ObjectToOptionalExample {
public static void main(String[] args) {
Employee employee = new Employee(1,"Sam","Page",200000);
Optional<Employee> optionalEmployee = Optional.ofNullable(employee);
//Checks
if (optionalEmployee.isPresent()) {
Employee resultEmployee = optionalEmployee.get();
System.out.println("Hello " + employee.getLastName());
} else {
System.out.println("Employee object is null!");
}
}
}
Facing issues? Have Questions? Post them here! I am happy to answer!
Author Info:
Rakesh (He/Him) has over 14+ years of experience in Web and Application development. He is the author of insightful How-To articles for Code2care.
Follow him on: X
You can also reach out to him via e-mail: rakesh@code2care.org
More Posts related to Java,
- Get the current timestamp in Java
- Java Stream with Multiple Filters Example
- Java SE JDBC with Prepared Statement Parameterized Select Example
- Fix: UnsupportedClassVersionError: Unsupported major.minor version 63.0
- [Fix] Java Exception with Lambda - Cannot invoke because object is null
- 7 deadly java.lang.OutOfMemoryError in Java Programming
- How to Calculate the SHA Hash Value of a File in Java
- Java JDBC Connection with Database using SSL (https) URL
- How to Add/Subtract Days to the Current Date in Java
- Create Nested Directories using Java Code
- Spring Boot: JDBCTemplate BatchUpdate Update Query Example
- What is CA FE BA BE 00 00 00 3D in Java Class Bytecode
- Save Java Object as JSON file using Jackson Library
- Adding Custom ASCII Text Banner in Spring Boot Application
- [Fix] Java: Type argument cannot be of primitive type generics
- List of New Features in Java 11 (JEPs)
- Java: How to Add two Maps with example
- Java JDBC Transition Management using PreparedStatement Examples
- Understanding and Handling NullPointerException in Java: Tips and Tricks for Effective Debugging
- Steps of working with Stored Procedures using JDBCTemplate Spring Boot
- Java 8 java.util.Function and BiFunction Examples
- The Motivation Behind Generics in Java Programming
- Get Current Local Date and Time using Java 8 DateTime API
- Java: Convert Char to ASCII
- Deep Dive: Why avoid java.util.Date and Calendar Classes
More Posts:
- How to Use Command Prompt on a Mac? - MacOS
- Android xml error Attribute is missing the Android namespace prefix [Solution] - Android
- How to enable Do Not Disturb (DND) mode in Microsoft Teams - Teams
- Check if a file exists or not using Bash Script - Bash
- How to Convert a Java Object into an Optional with Example - Java
- Android Emulator Soft Back button action using Computer keyboard - Android
- Iterate over an Array using Java 8 Stream and foreach - Java
- How to set an emoji as Zsh terminal prompt in macOS - MacOS