[Spring] Exploring Java Bean vs POJO vs Spring Bean

Starting Spring Framework(3)

/ Java Bean / POJO / Spring BEAN /

• Java Bean : Classes adhering to 3 constraints:
  • 1: Have public default(no argument) constructors
  • 2: Allow access to their properties using getter and setter methods
  • 3: Implement java.io.Serializable
• POJO : Plain Old Java Object
  • No constraints
  • Any Java Object is a POJO
• Spring Bean : Any Java object that is managed by Spring
  • Spring uses IOC Container (Bean Factory or Application Context) to manage these onjects