In Java, the default value of any reference variable is a null value that points to a memory location but does not have any associate value. When a programmer tries to perform any operation with this reference variable, it throws a null pointer exception due to null conditions. ...
ptris the name of our variable (just askwas the name of our integer variable). The '*' informs the compiler that we want a pointer variable, i.e. to set aside however many bytes is required to store an address in memory. Theintsays that we intend to use our pointer variable to sto...
A pointer is a variable. Like other variables, it has a data type and an identifier. However, pointers are used in a way that is fundamentally distinct from the way in which we use “normal” variables, and we have to include an asterisk to tell the compiler that a variable should b...
Aggregation Example in Java For example consider two classesStudentclass andAddressclass. Every student has an address so the relationship between student and address is a Has-A relationship. But if you consider its vice versa then it would not make any sense as anAddressdoesn’t need to have ...
in java, you cannot explicitly declare a method as constant like in c++. however, you can achieve similar behavior by using the final keyword for method parameters or local variables to ensure they are not modified within the method. what is the purpose of a declaration file in javascript?
In practice, what is passed is a pointer to theOuterprocedure’s stack frame. Now, if the containing function or precedure happens itself to be nested, then you can use the parent’s frame to access the local variables of the grandparent. ...
a mouse pointer is a small, graphical symbol or icon that appears on your computer screen and moves in response to your physical mouse movements. it serves as a visual representation of the position and actions of your mouse. how does the mouse pointer work? the mouse pointer is controlled ...
In Java 8 a functional interface is defined as an interface with exactly one abstract method. This even applies to interfaces that were created with previous versions of Java.Java 8 comes with several new functional interfaces in the package, java.util.function....
A constant in Java is used to map an exact and unchanging value to a variable name. Constants are used in programming to make code a bit more robust and human readable. Here's an example: Imagine you are creating a program that needs to calculate areas and volumes of different shapes, ...
element is pushed onto the top of a stack, the stack pointer is updated to the next physicalmemoryaddress on the stack. When a data element is popped from the top of a stack, the stack pointer is again updated to the next address, but this time the address changes in the opposite ...