Object Sorting in java

In this article, you are going to explore the sorting using Comparable Interface. This Interface has to be used when you want to sort your objects.

For example, in an employee class, you have properties Employee Name, Employee Experience, Employee Performance Rank. You have a collection of Employee Objects which is unordered. You need to sort by year-of-experience property. So, for this case, you have to implement the Comparable interface in employee class and you need to implement the compareTo() method.

employee.java

sortingdemo.java

Key Points

• When you want to sort objects, you have to implement the Comparable Interface and you have to add your sorting logic in the compareTo method.
• Then you can use the sort method from Collection class to get sorted.

Conclusion

• In Real-time you may get a collection of objects from the database and you get a requirement to display in order.
• For example, if you are developing an e-commerce website, you need to display collection products in the order(product object with properties like name, price, etc) which is retrieved from the database.
• So, In that case, you can use this sorting technique.