Latest Tutorials| Questions and Answers|Ask Questions?|Site Map



Home Answers Viewqa Java-Beginners Static keyword in public static void main
Login         

View Questions and Answers by Category

Advertisements


 
Have Programming Question? Ask it here!
 
 
 


sundeep rohilla
Static keyword in public static void main
2 Answer(s)      2 years and 11 months ago
Posted in : Java Beginners


Hi,

I have seen that on page mentioned below for static keyword explanation given is: Page: http://www.roseindia.net/java/learn-java-in-a-day/create-first-program.shtml Explanation: static keyword indicates that this method can be invoked simply by using the name of the class without creating any class-object.

Can you I get and an simple example for this?


Advertisement
View Answers

December 23, 2011 at 4:13 PM


The static variable is declared by using static keyword. Following is an example of static declaration:

static int i=10;

The variable declared with static keyword is called class variable. This variable is shared by all the instances of the class. The static variable can be accessed without creating the instance of the class or you can say, it can be called without any reference.

This variable is created statically and same variable is accessed by all instance of the class.

Example of static keyword:

class UseStatic {
static int a = 3;
static int b;
static void meth(int x) {
System.out.println("x = " + x);
System.out.println("a = " + a);
System.out.println("b = " + b);
}
static {
System.out.println("Static block initialized.");
b = a * 4;
}
public static void main(String args[]) {
meth(42);
}
}

In the above code, as soon as the UseStatic class is loaded, all of the static statements are run. First, a is set to 3, then the static block executes (printing a message), and finally, b is initialized to a * 4 or 12. Then main( ) is called, which calls meth( ), passing 42 to x. The three println( ) statements refer to the two static variables a and b, as well as to the local variable x.

Note It is illegal to refer to any instance variables inside of a static method. Here is the output of the program:

Static block initialized. x = 42 a = 3 b = 12



December 23, 2011 at 4:13 PM


The static variable is declared by using static keyword. Following is an example of static declaration:

static int i=10;

The variable declared with static keyword is called class variable. This variable is shared by all the instances of the class. The static variable can be accessed without creating the instance of the class or you can say, it can be called without any reference.

This variable is created statically and same variable is accessed by all instance of the class.

Example of static keyword:

class UseStatic {
static int a = 3;
static int b;
static void meth(int x) {
System.out.println("x = " + x);
System.out.println("a = " + a);
System.out.println("b = " + b);
}
static {
System.out.println("Static block initialized.");
b = a * 4;
}
public static void main(String args[]) {
meth(42);
}
}

In the above code, as soon as the UseStatic class is loaded, all of the static statements are run. First, a is set to 3, then the static block executes (printing a message), and finally, b is initialized to a * 4 or 12. Then main( ) is called, which calls meth( ), passing 42 to x. The three println( ) statements refer to the two static variables a and b, as well as to the local variable x.

Note It is illegal to refer to any instance variables inside of a static method. Here is the output of the program:

Static block initialized. x = 42 a = 3 b = 12



Related Tutorials/Questions & Answers:
Static keyword in public static void main
Static keyword in public static void main  Hi, I have seen that on page mentioned below for static keyword explanation given is: Page: http... = a * 4; } public static void main(String args[]) { meth(42); } } In the above
public static void main
public static void main  what is mean public static void main?  ... information, visit the following link: Understanding public static void main.... static-It indicates that the main() method is a class method. void- It indicates
Advertisements
Understanding public static void main function
Understanding public static void main function       The public static void main function is important.... Read more about public static void main function at http://www.roseindia.net
Why we are writting public static void main(String args[])?
Why we are writting public static void main(String args[])?  Why we are writting public static void main(String args[])? please elaborate it... and also explain the statement System.out.println("abc
JAVA what is different between static block and public static void main(String a[]) method
JAVA what is different between static block and public static void main(String... void main(String a[]) method,we execute method without main method(by static block) why need of public static void main(String [])?   Static blocks
What happen when we write static public void instead of public static void?
What happen when we write static public void instead of public static void?  Hi, What happen when we write static public void instead of public.../gettingstartedwithjava/public-static-void-main.shtml   Hi
What is Public static void main
What is Public static void main In most of the Programming language, main... are the variation of main method. public static void main(String[] args) public static void main(String... args) public static void main(String args
static keyword
static keyword  please give some detail about Static keyword.   Static Variables Static variables are class variables that are shared... and not to object(instance). 2)Static variables are initialized only once , at the start
static keyword
static keyword  Hii, In which portion of memory static variables stored in java. Is it take memory at compile time? thanks deepak mishra
static keyword with real example
static keyword with real example  static keyword with real examplestrong text
why using static keyword
why using static keyword  why using static keyword
static keyword in interface
static keyword in interface  Could any one explain,why static keyword implict (or explict ) come in interface? I asked lot of persons about this question, but nobody did not answered clearly. please explain clearly and say what
static Java Keyword
of the use of the " public static void main method()" in most of the console... getObjects(){ } public static void main method(String av... static keyword with a class: public class Class1
static keyword in java
); } } public class Test{ public static void main(String args... .style1 { color: #0000FF; } static keyword in java We are going to discuss about static keyword in java. The static keyword is a special
STATIC
is an example: public class StaticTest { static{ System.out.println("Hello from static block"); } public static void helloMethod() { System.out.println("Hello from static method"); } public static void main(String[] args) { helloMethod
Why is the main method declared static?
Why is the main method declared static?  Hi, Why is the main method declared static? thanks   Hi, When we declare main() method in any Java class always has the same signature, and we declare public static void main
static
static  what r the main uses of static in java   Hi Friend, The Static means that a certain object/variable is resident in memory... instances of the class. When static is applied to methods, the static keyword
static
StaticClass1 { public static void main(String[] args){ StaticClass1 sv1...redeclare static variable in the inherited class  can we redeclare static variable in the inherited class like this: public class StaticClass1
static
is why if you declare the function main as static then java does not have...Static Concept  in what are all the situation we may use static...,then use static blocks and without creation of object we need to perform some task
Can we replace main() with static block or with other static methods?
Can we replace main() with static block or with other static methods?  what is the use of public static void main()?can't we achieve the same thing through static block or through other static methods
static
static  What is the exact need of declaring a variable as static?   A static variable is a variable who's single copy in memory is shared by all objects,so any modifications to the static variable will modify it's value
Static
Static  Can i know the real time example for Static method and final variables with defenition? Thank you
Accessing non-static members through the main method in Java.
it is permanently public static void... Accessing non-static members through the main method in Java.  As an oop rule, a static method can have access only to static variables and static
The void keyword
is the syntax that displays how to use the keyword voidpublic class... The void keyword       The void is a keyword defined in the java programming language. Keywords
making consistency of data member in the whole programme without using static keyword
Jointdetails { public: Jointdetails(void); ~Jointdetails(void); bool... { public: Analyzer(void); Jointdetails* GetJointDetails(); Jointdetails... #include "Analyzer.h" class Tst1 { public: Tst1(void); Analyzer *analyzer1
static functions
(){ System.out.println("it is static methode"+a); } } class main{ public static void...{ public static void main(string args[]){ a obj=new a();//can ,t requirement..."+a); } } class main{ public static void main(string args[]){ a obj=new a();//can ,t
I'm getting an illgal start of expression error in my code for the public static boolean portion at the bottom... any ideas?
{ public static void main (String[] args) { Random rand = new Random... { public static void main (String[] args) { Random rand = new Random...; } } } } public static boolean playAgain
void Java Keyword
void Java Keyword       The void is a keyword defined in the java programming language. Keywords... in java programming language likewise the void keyword indicates the following
Static Variable
. When static is applied to methods, the static keyword means that the specified...Static Variable  What is the basic use of introducing static variable type in java?Please explain clearly....   The Static means
Static variable in java
; } public static void main(String args[]) { salary=10000...Static variable in java. Static is a keyword in java used to create static...; Classname.variablename; Example: Using Static Variable. public class Staticvariable
 

 

 

DMCA.com