Can we have main method without arguments?

Can we have main method without arguments?

A method like this generates Main method not found compiler error. Since we never use any arguments to the main method, this should be allowed.

Why Does main () take String as an argument?

main() is special because it is the start of the program. “String[]” means an array of String. “args” is the name of the String[] (within the body of main()). “args” is not special; you could name it anything else and the program would work the same.

What happens if main () method is written without String args?

What happens if the main() method is written without String args[]? The program will compile, but not run, because JVM will not recognize the main() method. Remember JVM always looks for the main() method with a string type array as a parameter.

Can main method have arguments?

You can write the public static void main() method with arguments other than String the program gets compiled. Since the main method is the entry point of the Java program, whenever you execute one the JVM searches for the main method, which is public, static, with return type void, and a String array as an argument.

Can we execute a Java program without main method?

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 we execute program without main method in Java?

What is the purpose of the main method in Java?

The purpose of main method in Java is to be program execution start point. When you run java.exe , then there are a couple of Java Native Interface (JNI) calls.

Can we pass arguments in Main in Java?

Command-line arguments in Java are used to pass arguments to the main program. If you look at the Java main method syntax, it accepts String array as an argument. When we pass command-line arguments, they are treated as strings and passed to the main function in the string array argument.

Can we use array as argument in main method in Java?

Therefore, if you write a method with other data types (except String array) as arguments, at the time of execution, JVM does not consider this new method as the entry point of Java and generates an error. In the following Java program, we are trying to use an integer array as arguments of the main method.

How to write the main method with arguments other than string?

You can write the public static void main () method with arguments other than String the program gets compiled. Since the main method is the entry point of the Java program, whenever you execute one the JVM searches for the main method, which is public, static, with return type void, and a String array as an argument.

Why is my main() method not working in Java?

If you try to run a class with the Java interpreter that does not have a main() method, the interpreter prints an error message. For more information see Troubleshooting Interpreter Problems . As you can see from the code snippet above, the main() method accepts a single argument: an array of Strings.

What is the difference between void main and main in Java?

void: In Java, every method has the return type. Void keyword acknowledges the compiler that main () method does not return any value. main (): It is a default signature which is predefined in the JVM. It is called by JVM to execute a program line by line and end the execution after completion of this method.