Introduction
In this lab, we are going to learn about the Java's LocalDate plusMonths() method, which can be used to add months to a date and return a new LocalDate.
Create a new Java file
Create a new Java file named DateDemo.java in the ~/project directory using the following command:
touch ~/project/DateDemo.java
Import LocalDate Class
Import the LocalDate class by adding the following line of code at the top of the file.
import java.time.LocalDate;
Create a LocalDate Object
Create a new LocalDate object and set it to a specific date YYYY-MM-DD format. Here's an example that sets the date to October 21, 2016:
LocalDate localDate = LocalDate.of(2016, 10, 21);
Add Months using plusMonths()
Use the plusMonths() method to add the specified number of months to the date. The method takes a long argument that represents the number of months to add.
localDate = localDate.plusMonths(2);
This adds 2 months to the localDate object and stores the new LocalDate object in the same reference variable.
Print the Date
Finally, print the date to verify that it has been updated.
System.out.println(localDate);
Compile and Run the Code
Use the following command to compile the code:
javac ~/project/DateDemo.java
Use the following command to run the code:
java DateDemo
Add Months to Current Date
You can also add months to the current date using the LocalDate.now() method, which returns the current date. Here's an example that adds 2 months to the current date:
LocalDate localDate = LocalDate.now();
System.out.println(localDate);
localDate = localDate.plusMonths(2);
System.out.println("New date : "+localDate);
Compile and Run the Code
Use the following command to compile the code:
javac ~/project/DateDemo.java
Use the following command to run the code:
java DateDemo
Summary
In this lab, we learned to use the plusMonths() method of the LocalDate class in Java to add months to a date. We learned that the method takes a long argument that represents the number of months to add and returns a new LocalDate object with the specified number of months added. We also learned to create a new LocalDate object, add months to a specific date, and add months to the current date.
