What is the purpose of toString () method in Java?

The toString method returns a String representation of an object in Java. By default, the toString method returns the name of the object’s class plus its hash code. Here, you find out how to use the toString method and how to override it in your own classes to create more useful strings.

Why should we override toString method in Java?

Overriding toString() Method in Java It is the most frequent method of Java been used to get a string representation of an object. So this method is overridden in order to return the values of the object which is showcased below via examples.

Why is it a good idea to override the toString and equals methods when creating a new class?

You will not get what the object actually has in it. There will be no information about state or properties of an object. Therefore, it is recommended that every class you write must override toString() method so that you quickly get an overview of an object.

Is a toString method void?

It’s not a void method. Only a void method in Java doesn’t need to use the return keyword. So being that we declared the toString() method to be of a String return type, it must return a String. So in the body we write the return keyword and we follow it with the object parameters we want to specify.

Which method Cannot be overridden?

A method declared final cannot be overridden. A method declared static cannot be overridden but can be re-declared. If a method cannot be inherited, then it cannot be overridden.

What happens if we print an object in Java?

If you print any object, Java compiler internally invokes the toString() method on the object. So overriding the toString() method, returns the desired output, it can be the state of an object etc. depending on your implementation.

What is the purpose of overriding a method?

The ability of a subclass to override a method allows a class to inherit from a superclass whose behavior is “close enough” and then to modify behavior as needed. The overriding method has the same name, number and type of parameters, and return type as the method that it overrides.

Can we override notify method in Java?

Ans. wait and notify are declared final in object class and hence cannot be overridden.

What does it mean to override a method Why should the toString method be overridden for user defined classes?

Override the toString() method in a Java Class A string representation of an object can be obtained using the toString() method in Java. This method is overridden so that the object values can be returned.

Why main method is declared as static?

Main() is declared as static as it is directly call by the JVM without creating an object of the class in which the it is declared. When java runtime starts,there is no object of class present. Thats why main method has to be static,so JVM can load the class into memory and call the main method.

What methods Cannot be overridden in Java?

A method declared final cannot be overridden. A method declared static cannot be overridden but can be re-declared. If a method cannot be inherited, then it cannot be overridden. A subclass within the same package as the instance’s superclass can override any superclass method that is not declared private or final.

Which methods Cannot be overloaded in Java?

We cannot overload two methods in Java if they differ only by static keyword (number of parameters and types of parameters is the same).

What is the use of toString in Java?

Java toString () method If you want to represent any object as a string, toString () method comes into existence. The toString () method returns the string representation of the object. If you print any object, java compiler internally invokes the toString () method on the object.

Why ToString() method is invoked internally in Java?

It is very important and readers should be aware that whenever we try to print the object reference then internally toString () method is invoked. If we did not define the toString () method in your class then the Object class toString () method is invoked otherwise our implemented or overridden toString () method will be called.

What happens when you override the toString() method of the object class?

So overriding the toString() method, returns the desired output, it can be the state of an object etc. depends on your implementation. By overriding the toString() method of the Object class, we can return values of the object, so we don’t need to write much code. Let’s see the simple code that prints reference.

How to get the string representation of an object in Java?

Therefore the Object class methods are available to all Java classes. Now we will be dealing with one of its methods known as toString () method. We typically generally do use the toString () method to get the string representation of an object.