What are methods of Object class in Java?

Object class has below methods

• toString() Method.
• hashCode() Method.
• equals(Object obj) Method.
• getClass() method.
• finalize() method.
• clone() method.
• wait(), notify() notifyAll() Methods.

What are the four main methods of the Object class?

Methods of Object class compares the given object to this object. creates and returns the exact copy (clone) of this object. returns the string representation of this object. wakes up single thread, waiting on this object’s monitor.

Which three are methods of the Object class?

protected native Object clone() throws CloneNotSupportedException.

Which methods are inherited from Object class?

The methods inherited from Object that are discussed in this section are:

• protected Object clone() throws CloneNotSupportedException.
• public boolean equals(Object obj)
• protected void finalize() throws Throwable.
• public final Class getClass()
• public int hashCode()
• public String toString()

How many methods are in object class in Java?

There are 11 methods in Object class . Checks whether the obj object is equal to the object on which the equals method is called .

How many methods are there in a class?

a) Methods should not have more than an average of 30 code lines (not counting line spaces and comments). b) A class should contain an average of less than 30 methods, resulting in up to 900 lines of code.

Which of the given methods are of object class Mcq?

35) Which of the given methods are of Object class? Explanation: The notify(), notifyAll(), and wait() are the methods of the Object class.

How many types of object class methods are there?

Which of following methods belong to object class?

protected Object clone() – Used to create and return a copy of this object. boolean equals(Object obj) – Used to indicate whether some other object is “equal to” this one.

How many methods should be in a class Java?

a) Methods should not have more than an average of 30 code lines (not counting line spaces and comments). b) A class should contain an average of less than 30 methods, resulting in up to 900 lines of code. c) A package shouldn’t contain more than 30 classes, thus comprising up to 27,000 code lines.

How many methods can a class have in Java?

The number of methods that may be declared by a class or interface is limited to 65535 by the size of the methods_count item of the ClassFile structure (§4.1).

What is an object method?

Unlike Array prototype methods like sort() and reverse() that are used on the array instance, Object methods are used directly on the Object constructor, and use the object instance as a parameter. This is known as a static method.

What are the levels of hierarchy in Java?

The hierarchy of classes in Java has one root class, called Object , which is superclass of any class. Instance variable and methods are inherited down through the levels. In general, the further down in the hierarchy a class appears, the more specialized its behavior.

What is class hierarchy in OOP?

A class hierarchy or inheritance tree in computer science is a classification of object types, denoting objects as the instantiations of classes (class is like a blueprint, the object is what is built from that blueprint) inter-relating the various classes by relationships such as “inherits”, “extends”, “is an …

Which of these class is highest in hierarchy in Java?

The class at the top of the exception class hierarchy is the Throwable class, which is a direct subclass of the Object class. Throwable has two direct subclasses – Exception and Error.

Which of this method of object class is used to obtain a class of an object at run time?

getClass() – Used to get the runtime class of this Object.

How many methods a class should have?

How many methods can there be in a class?

How many methods should be in a class?

Can a class have 2 main methods?

The answer to the question would be Yes. We can overload the main method. We can create many methods with the same name main. However, as mentioned earlier, only the public static void main(String[] args) method is used for the program execution.

What are the methods in Java?

There are two types of methods in Java:

• Predefined Method.
• User-defined Method.