We can override the toString() method in our class to print proper output. For example, in the following code toString() is overridden to print the “Real + i Imag” form.
Can toString method be overloaded?
ToString method. Types frequently override the Object. ToString method to provide a more suitable string representation of a particular type. Types also frequently overload the Object.
Why do we need to override toString method in Java?
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. So overriding the toString() method, returns the desired output, it can be the state of an object etc.
Can we override string class methods?
You can’t override final classes, of which String is one. You can, though, create your own class with String helper functions.
What will happen if we don override toString () method?
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.
What is @override in Java?
The @Override annotation indicates that the child class method is over-writing its base class method. The @Override annotation can be useful for two reasons. It extracts a warning from the compiler if the annotated method doesn’t actually override anything. It can improve the readability of the source code.
Is toString automatically called?
toString() gets invoked automatically. Object. toString() ‘s default implementation simply prints the object’s class name followed by the object’s hash code which isn’t very helpful. So, one should usually override toString() to provide a more meaningful String representation of an object’s runtime state.
Can we override String?
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.
Can we override abstract method?
E. Abstract methods cannot be overridden by a concrete subclass.
Can we create String object without new operator?
You can use clone method to create a copy of object without new operator. clone is used to make a copy of object. There are certain things which you should keep in mind while using clone method of Object. Returns the Class object associated with the class or interface with the given string name.
Can subclass override the methods of superclass?
A subclass within the same package as the instance’s superclass can override any superclass method that is not declared private or final. A subclass in a different package can only override the non-final methods declared public or protected.
What is difference between overloading and overriding?
What is Overloading and Overriding? When two or more methods in the same class have the same name but different parameters, it’s called Overloading. When the method signature (name and parameters) are the same in the superclass and the child class, it’s called Overriding.
Can we override variables in Java?
Variables are not polymorphic in Java; they do not override one another. So, as a variable is not overridden, no run time resolution is done for them, hence in the inheritance chain the variable value of the reference class is used when accessed instead of the object type.
What does toString () do in Java?
A toString() is an in-built method in Java that returns the value given to it in string format. Hence, any object that this method is applied on, will then be returned as a string object.
Can we make an object final?
You declare a reference as final and not the actual object. That means, you cannot change the value of the reference (which is an address pointing to the object). So once you declare a reference as final, you cannot reassign it to another object. So declaring a variable as final is like making it a constant.
What is toString () and why we need it?
Usually toString() method is used to print contents of an object. This method is already overridden in many java built-in class like String , StringBuffer , integer etc. It used when we have to display the field values which we initialize through constructor and what to display without using any getter.