That refers to a variable attached to an object - also known as a field.
In Java, there are three kinds of variables: local variables, instance variables, and class variables. Variables have their scopes. Different kinds of variables have different scopes. A variable is shadowed if there is another variable with the same name that is closer in scope. In other words, referring to the variable by name will use the one closest in scope, the one in the outer scope is shadowed.A Local Variable Shadows An Instance VariableInside a class method, when a local variable have the same name as one of the instance variable, the local variable shadows the instance variable inside the method block.
objects whose properties are different instance datamember n member function are use for that
Fields defined without the "static" keyword.Their value is unique to each instance (object) of a class.AnswerInstance variable is a variable declared within the class for which every object of the class has its own value.
native is a key word used in java method. there is no variable as native in java
An object is the actual storage space in memory in which some collection of data resides.A reference variable is a variable which refers to the memory location of an object.Look at the pseudocode below:Object obj = new Object();Here obj is the reference variable, and the data to which it refers is the object.
If it is a class or instance variable, it gets the default value of false. If it is a local variable (inside a method), it doesn't have a value until you explicitly set one.
Java by default initializes it to the default value for that primitive type. Thus an int will be initialized to 0(zero), a Boolean will be initialized to false.
A Variable that is shared as well as synchronized cannot be created in Java. These two terms are mutually exclusive and a variable that is synchronized in java cannot be shared and vice versa
Usually Private is the preferred access modifier for instance variables. Benefits: 1. No other class can access this variable directly. They can do only through the getter/setter methods 2. Only the methods in that particular class can use this variable
There's no global variables in Java.
In the case of an instance variable, there is one copy for every instance (object). If you create 10 objects based on a class, there will be 10 copies of the variable. A class variable exists only once for the entire class - no matter how many objects you create - or even if you create no objects based on the class. In Java, such variables (class variables) are declared with the statickeyword.
Default values are available for any class or instance variable. If you do not specify a value for a class or instance variable the JVM will provide a default value that will ensure that the system does not end up with any unexpected errors because you used a variable that was not initialized. Ex: Public class Test { int I; } In the above class we have just declared an instance variable called 'I' but we haven't associated any value to it. The JVM automatically assigns 0 as the default value to this variable.