If you still, try to do so a compile time error is generated saying “non-static variable math cannot be referenced from a static context”. Therefore, you cannot make static reference to non-static fields(variables) in Java. referring a variable using static reference implies to referring using the class name.īut, to access instance variables it is a must to create an object, these are not available in the memory, before instantiation. Static reference e to non-static variablesĪs discussed above Static variables are referred (accessed) using the class name. You can define a static field using the static keyword. the value of the static field will be same in all objects. They are available to access at the compile time, you can access them before/without instantiating the class, there is only one copy of the static field available throughout the class i.e. to access an instance variable you need to create an object of the class and using this object you need to access these variables.Ĭlass/static variables − class/static variables belong to a class, just like instance variables they are declared within a class, outside any method, but, with the static keyword. You must access instance variables using an object. They can be accessed from any method, constructor or blocks of that particular class. These are initialized when the class is instantiated. These are declared within a class but outside methods. Instance variables − These variables belong to the instances (objects) of a class. The scope of these variables lies within the method (or, block or, constructor) and will be destroyed after he execution of it. Local variables − These variables belong to and declared/defined within the methods/blocks/constructors. A class in Java will have three kinds of variables namely, static (class), instance and, local.
0 Comments
Leave a Reply. |