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Dec 7, 2012 · final -. 1)When we apply " final " keyword to a variable,the value of that variable remains constant. (or) Once we declare a variable as final.the value of that variable cannot be changed. 2)It is useful when a variable value does not change during the life time of a program. static -.
4. final is a reserved keyword in Java to restrict the user and it can be applied to member variables, methods, class and local variables. Final variables are often declared with the static keyword in Java and are treated as constants. For example: public static final String hello = "Hello";
A final variable is one that once after initialized ,after the instantiation of a class (creation of an object) cannot be altered in the program. However this differ from objects if a different value is passed post creation of another object of the same class. final static means that the variable belongs to the class as well as cannot be change ...
7. The keyword static is used to denote a field or a method as belonging to the class itself and not to any particular instance. Using your code, if the object Clock is static, all of the instances of the Hello class will share this Clock data member (field) in common.
Feb 1, 2009 · Use the keyword final when you want the compiler to prevent a variable from being re-assigned to a different object. Whether the variable is a static variable, member variable, local variable, or argument/parameter variable, the effect is entirely the same. Example. Let’s see the effect in action.
Long answer: When talking about final local variables keep in mind that using the keyword final will help the compiler optimize the code statically, which may in the end result in faster code. For example, the final Strings a + b in the example below are concatenated statically (at compile time).
18. A Java constructor is implicitly final, the static / non-static aspects of its semantics are implicit1, and it is meaningless for a Java constructor to be abstract. This means that the final and static modifiers would be redundant, and the abstract keyword would have no meaning at all. Naturally, the Java designers didn't see in any point ...
May 8, 2014 · 10. static means that a field or method belongs to the class, as opposed to individual instances of the class. final actually means different things when applied to methods versus fields (or local variables): final variables and fields cannot be reassigned. This is fairly similar to C++'s const.
Declaring the field as 'final' will ensure that the field is a constant and cannot change. The difference comes in the usage of 'static' keyword. Declaring a field as static means that it is associated with the type and not with the instances. i.e. only one copy of the field will be present for all the objects and not individual copy for each ...
Update: There is a new "Java Style Guidelines" initiative in place for projects in the OpenJDK community. It also has a recommendation for a modifier order and also includes the new default modifier of Java 8. public / private / protected abstract static final transient volatile **default** synchronized native strictfp
