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The name really throws me off. I'm hoping someone can explain it in a way I won't forget :)
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JavaBeans are classes that encapsulate many objects into a single object (the bean). It is a java class that should follow following conventions: Must implement Serializable. It should have a public no-arg constructor. All properties in java bean must be private with public getters and setter methods.
yes java beans are piece of reusable codes,this means that you can reuse it any where.
The class Object 's clone() method creates and returns a copy of the object, with the same class and with all the fields having the same values. However, Object. clone() throws a CloneNotSupportedException unless the object is an instance of a class that implements the marker interface Cloneable .
clone() is indeed a shallow copy. However, it's designed to throw a CloneNotSupportedException unless your object implements Cloneable . And when you implement Cloneable , you should override clone() to make it do a deep copy, by calling clone() on all fields that are themselves cloneable.
Any serializable java class (implementing java.io.Serializable) that follows specific conventions: a no-argument constructor, and properties accessible via get/set/is accessors.
The idea is to make it predictable, so that properties etc can be discovered automatically through reflection - of great help in tool and framework development.
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http://en.wikipedia.org/wiki/JavaBean
JavaBeans are reusable software components for Java that can be manipulated visually in a builder tool. Practically, they are classes written in the Java programming language conforming to a particular convention. They are used to encapsulate many objects into a single object (the bean), so that they can be passed around as a single bean object instead of as multiple individual objects. A JavaBean is a Java Object that is serializable, has a nullary constructor, and allows access to properties using getter and setter methods.
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