T7: Knowledge Tip Of The Day.......
The three key characteristics of Object are
• State
• Behavior
• Identity
• State
• Behavior
• Identity
State:
• Instance variables value is called object state.
• An object state will be changed if instance variables value is changed.
• Instance variables value is called object state.
• An object state will be changed if instance variables value is changed.
Behavior:
• Behavior of an object is defined by instance methods.
• Behavior of an object is depends on the messages passed to it.
• So an object behavior depends on the instance methods.
• Behavior of an object is defined by instance methods.
• Behavior of an object is depends on the messages passed to it.
• So an object behavior depends on the instance methods.
Identity:
• Identity is the hashcode of an object, it is a 32 bit integer number created randomly and assigned to an object by default by JVM.
• Developer can also generate hashcode of an object based on the state of that object by overriding hashcode() method of java.lang.Object class.
• Then if state is changed , automatically hashcode will be changed.
• Identity is the hashcode of an object, it is a 32 bit integer number created randomly and assigned to an object by default by JVM.
• Developer can also generate hashcode of an object based on the state of that object by overriding hashcode() method of java.lang.Object class.
• Then if state is changed , automatically hashcode will be changed.
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