We can't call a class. We always call a method in java.
Nothing will happen. There is no restriction that every Java class must have a main method. The only program is that, this class cannot be executed as a standalone java program.
Theoretically yes. You will use only one main method for your whole java application and hence such a situation will not come up in real life. Imagine: You have a main in class A and one more in class B which extends class A. When you try to run the class B, only that main method will be executed and not the main in class A. So this override is irrelevant and we cannot call class A's main method at all
The driver class is often the class that contains the "Main" method.
Yes. Every Java class can have a main method
No, all classes MUST have a main method.
You cannot do that. The main method of a java class is the point where the execution begins. You can print messages only after a main method is invoked.
No. It is a user defined function which the person who is creating the java class has to code by himself.
Java source files have the .java extension, compiled Java class files have the .class extension.
No. Java classes in web applications do not have Main Methods.
I assume the question is about Java. How you call a method from inside the main method depends on whether this is an instance method or a static method. To call an instance method, you need to have a valid instance. Say foo is an instance of class Foo, which was created inside the main method. Then to call the instance method implode() use foo.implode() To call the static method bar() of class Foo, use Foo.bar().
The class/jar was compiled with a later major version of java than the version of java you are using to run the code with. So for instance the class was compiled with java 1.5 and you are running the class with java 1.4, which doesn't understand the format of 1.5 class files. check "java -version" from the command prompt.
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