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       How does a null pointer 
   DIR By: asim roy
       Date: September 14, 2023, 6:16 am
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       A typical example of a compile-time exception is missing
       parentheses. The compiler or will prompt the developer that the
       parenthesis are missing and should be inserted. The code will
       never compile unless parentheses are inserted. In contrast
       runtime exceptions are critical and cannot be caught at compile
       time. If they are not handled they can crash the program at
       runtime. For example if a number is divided by zero at runtime a
       will be thrown at runtime. This exception is not caught at
       runtime because the compiler does not know in advance that the
       number will be divided by zero.
       Another extremely important runtime exception that you need to
       understand thoroughly for proper planning and error handling is
       the null pointer exception. To learn more about exceptions take
       the course on . What is a null pointer exception? Popular
       Courses In object-oriented programming Phone Number List
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       when a class is instantiated its
       objects are stored in computer memory. To reference the object
       and use it in a program you need a reference variable of the
       class type that has the object that must be instantiated. This
       reference variable actually points to a memory address of the
       object. To call the object's methods and access the properties
       and fields of the class use this reference variable.
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       A null pointer exception occurs when an object's reference
       variable contains a null value and the object is used to call a
       method or instance variable.  exception occur? For ease of
       explanation we explain the NullPointerException with the help of
       code and code two of the most widespread object-oriented
       languages. Null pointer exceptions also occur in and where an
       actual pointer is used to point to a memory location. The
       following example demonstrates how a null pointer exception in
       and actually occurs. Code Suppose there is a class called . The
       class is defined as follows public class Person public integer
       Age public string name public return age public voidage the age.
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