How to write a java program without a main method - Quora.
Because there was a change in Java 7 so that it checks if there's a main() method before it actually runs the program. Discussions about how to write a Java program without a main() method happen regularly here - if you search the forums, you'll find lots of discussions about this topic.
It seems that Java 7 specifications does not allow to execute a Java program without main method. So the answer you have to tell is upto Java SE 6 it is possible to execute a Java program without main method. But from Java SE 7 onwards it is not possib.
Java main() method The main() is the starting point for JVM to start execution of a Java program. Without the main() method, JVM will not execute the program. The syntax of the main() method is.
Can we execute program without main method. Answer: Without main method you can not run java class as an application because at runtime java will search main method and don’t find it it will throw exception.Please s ee example class below.
Can we write and execute a program without main() method in jdk 1.7.If we can execute it please let me know and provide the code in the reply. 0 you can done this task by static block.
You can write a runnable Java program which does not have main method at all. This can be done using the static block of the class. The reason this works is that static initialization blocks get executed as soon as the class is loaded, even before the main method is called.
The static block is first executed as soon as the class is loaded before the main(); method is invoked and therefore before main() is called, System.exit(0) initiates VM shut down. The System.exit method halts the execution of the current thread and all others dead in their tracks.
All Java programs must have an entry point, which is always the main() method. Whenever the program is called, it automatically executes the main() method first.
Yes,We can write a Java program which does not have main method at all. This can be done using the static block of the class. How this works is that static initialization blocks get executed as soon as the class is loaded, even before the main method is called.
If only a single Java class in your Java program contains a main() method, then the class containing the main() method is often referred to as the main class. You can have as many classes as you want in your project with a main() method in.
Java does not support “directly” nested methods. Many functional programming languages support method within method. Many functional programming languages support method within method. But you can achieve nested method functionality in Java 7 or older version by define local classes, class within method so this does compile.
How to Write and Use a Java Method. by Nancy Sewell. Simple Java Method Sometimes the terms function and method are used interchangeably. They are virtually the same. The correct terminology for Java is method. It is a set of commands that can be used over again. In this, they share similarities with sub routines in the early days of programming.
Why is the main method static? Can we execute a program without main method? The static keyword in Java is used for memory management mainly. We can apply java static keyword with variables, methods, blocks and nested class. The static keyword belongs to the class than an instance of the class. If you declare any variable as static, it is known.
