Quick Answer: Can Java Program Run Without Main?

Does not have a main method Java?

A Java program can run without the main method.

You need a static block for that, and You need to put your executable code in that static block and execute it.

It compiles successfully but when we run this code using Static class as an object with System..

Can you make a constructor final?

No, a constructor can’t be made final. A final method cannot be overridden by any subclasses. … In other words, constructors cannot be inherited in Java therefore, there is no need to write final before constructors.

Can a main () method be declared final?

Yes, we can declare the main () method as final in Java. The compiler does not throw any error. … The main use of the final method in Java is they are not overridden. We can not override final methods in subclasses.

Is String args necessary in Java?

There’s no significant downside in having to include the parameter. The Java runtime system looks specifically for a method with a single String[] type parameter, because it wants to pass the parameters to your main method. If such a method is not present, it informs you through an exception.

Can we override the main method?

No, we cannot override main method of java because a static method cannot be overridden. The static method in java is associated with class whereas the non-static method is associated with an object.

Can we override static method?

Can we Override static methods in java? We can declare static methods with the same signature in the subclass, but it is not considered overriding as there won’t be any run-time polymorphism. Hence the answer is ‘No’.

What is String [] args?

Whenever you run a Java program with command prompt or want to give command line arguments, then “String[] args” is used. … String[] args in Java is an array of strings which stores arguments passed by command line while starting a program. All the command line arguments are stored in that array.

Should a main () method be compulsorily declared in all Java programs?

main() method is not mandatory to declare in all the java classes but It must be created in the classes which you want to be executable or say the classes from where your application will execute. The classes with main() method works as the entry point for an application.

Can there be 2 main methods in Java?

A class can define multiple methods with the name main. The signature of these methods does not match the signature of the main method. These other methods with different signatures are not considered the “main” method. Yes it is possible to have two main() in the same program.

What are the six ways to use this keyword in Java?

What are the 6 ways to use this keyword in Java?this can be used to get the current object.this can be used to invoke current object’s method.this() can be used to invoke current class constructor.this can be passed as a parameter to a method call.this can be passed as a parameter to a constructor.this can be used to return the current object from the method.

What is main () in Java?

The main() Method. A Java application is a public Java class with a main() method. The main() method is the entry point into the application. The signature of the method is always: public static void main(String[] args) Command-line arguments are passed through the args parameter, which is an array of String s.

Does every Java program need a main?

Yes, it is required for any executable program. If you try to execute a Java class, the JVM will look for a main method to invoke it. … Not all classes need a main , only the one that serve as “entry point” for execution.

Can a program run without main?

Yes, we can execute a java program without a main method by using a static block. Static block in Java is a group of statements that gets executed only once when the class is loaded into the memory by Java ClassLoader, It is also known as a static initialization block.

Can you use this () and super () both in a constructor?

Because if you use this() and super() together in a constructor it will give compile time error. Because this() and super() must be the first executable statement. If you write this() first than super() will become the second statement and vice-versa. That’s why we can’t use this() and super() together.