Java.lang.Void class is a placeholder that holds a reference to a class object if it represents a void keyword. It is an uninstantiable placeholder. Well, uninstantiable means that this class has a private constructor and no other constructor that we can access from outside.
Methods of lang.void class is all inherited from Object class in Java:
- getClass(): Returns the runtime class of the argument Object.
- hashCode(): Returns a hash code value for the object.
- equals(): Checks whether the two objects are equal or not.
- clone(): Returns a copy of the object.
- toString(): Returns string representation of the object.
- notify(): Wakes up a single thread that is waiting on this object’s monitor.
- notifyAll(): Wakes up all threads that is waiting on this object’s monitor.
- wait(): Makes current thread to wait until previous thread invokes either notify() or notifyAll() methods.
- finalize(): Called By the garbage collector on an object when garbage collection determines that there are no more references to the object.
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