0
What else can I help you with?
Can you overwrite main function in java?
You can not overwrite a static method in Java,and 'main' is a static method.so,you can't overwrite the 'main'.
What is static java most commonly used for?
Static java method is the same as a static variable. They belong to a class and not an object of that class. If a method needs to be in a class, but not tied to an object, then one uses static java.
Do you use virtual functions in Java?
Every method in java that isn't a class (static) method is automatically "virtual." If you want to disable virtual overrides, make the method "final" in the base class.
Is it possible to define a java static method inside a main method?
Because, the main method is the starting point of the java program and if we need an object of that class even before the main can be invoked, it is not possible. Hence it is declared static so that the JVM Can acess the main method without having to instantiate that particular class
Can you overload static methods in Java?
Yes you can overload the static method. But it should be avoided because memory to static methods are allocated at the time of class load.....so memory will be wasted if we don't use that methods. Whereas non-static method memory allocation depends on Object
When will you define a method as static in java?
Static keyword when used with a method, specifies that this method belongs to the class and not a particular instance of the class (a.k.a object of the class) Ex: public class StaticTest { public static String getAuthorName() { return "Anand"; } } Here getAuthorName is the static method and it can be accessed without instantiating an object of the class StaticTest. You can access this method as: String authorName = StaticTest.getAuthorName();
Can we write static public void main in java?
the method of an class that can is triggered when starting a Java application e.g. by running the command: "java MyProgram" Answer Public is an Access Specifier,static is a keyword which illustrates that method shared along all the classes.void illustrates that this method will not have any return type.main is the method which string has an argument. Public specifier makes the method visible outside the Class and because of the static nature of the method, JVM can call this main method without instantiating the class 'MyProgram'.
Is it possible to write in static variables in main method in java?
Short answer: No. Only class member variables may be declared static. Local variables with a static declaration will throw an error (usually "illegal start of expression").
Can you refer static method from non static method in java?
Yes, it is possible to call a static method from a non-static method. However, it is not possible to call a non-static method from a static method without first having an instance to operate on.
Why using the name main for main method in java?
If you run an java file(as an .class or .jar file) there's always 1 method being called: The main(String[] args) method.The method is only called once.Example of an main method:public static void main(String args[]) throws IOException {LoggingBootstrap.bootstrap();gui = new GUI();}In this case it only bootstraps the logger and uses the constuctor method of GUI(the graphical user interface of the program)
Why should main be declared static and is declaring it public and void not sufficient?
The static modifier means that it does not have to be instantiated to use it. Before a program runs there are technically no objects created yet, so the main method, which is the entry point for the application must be labeled static to tell the JVM that the method can be used without having first to create an instance of that class. Otherwise, it is the "Which came first, the chicken or the egg?" phenomenon. Your main method should be declared as follows: public static void main (String[] args) { lots of your java code... } As we know, java is a pure OOP , that means everything should be in the class, main. Aso, because main is itself a function, static member functions should not refer to objects of that class. But we can access static functions through classname itself, as: class TestMain { public static void main(String args[]) { body; } } Now, cmd>javac TestMain.java cmd>java TestMain as we know the static member functions has to call through its class name. That's why the programme name must be same as the class name ,where we wrote the main function. Another important point is : static variables or member functions will load during class. That means before creating any instances(objects), the main function is the first runnable function of any program which we run manually, such as : cmd>java TestMain(run) if , any sharing information.
How do you invoke static methods?
if some method is static, then you can not call that method through the oobject of that class. but the name of the class. let us see a example: class Test { int a; int b; static void show() { System.out.println("we are in show"); } } class Main { public static void main(String args[]) { Test t=new Test(); t.show();\\thiss is an erroraneous code. because, the method "show()" is static. Test.show();\\this is correct } Arnas Sinha
