What is the parent class of all classes in Java?

In Java, the parent class of all classes is the Object class, which provides standard members and methods to ensure code consistency and cross-platform portability. The Object class provides basic members (such as hashCode) and methods (such as equals and toString), allowing custom classes to easily add additional functionality.

The parent class of all classes in Java: Object class

In Java, all classes inherit directly or indirectly Since the Object class, the Object class is the foundation of the class hierarchy. This means that all classes have members and methods defined by the Object class.

Members of Object class

• Static fields:

  • class : Return the Class object representing the object of this class.

• Instance field:

  • hashCode: Returns the hash code of the object.

Basic methods of the Object class

• equals(Object): Compare two objects for equality.
• getClass(): Returns the Class object representing the object of this class.
• hashCode(): Returns the hash code of the object.
• notify(): Wake up a thread that is waiting for this object to be locked.
• notifyAll(): Wake up all threads waiting for this object to be locked.
• toString(): Returns the string representation of the object.
• wait(): Put the calling thread into a blocking state until the lock of this object is awakened or the wait times out.

Main benefits of inheriting from the Object class

• Consistency: All classes have standard members and methods, This makes the code easier to understand and maintain.
• Portability: The Object class is part of the Java Virtual Machine (JVM), which ensures that all subclasses of the class can run on any platform that supports Java.
• Flexibility: The Object class provides basic functionality that enables custom classes to easily add additional functionality and behavior.

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