Java Main Method

In Java, the main method serves as the entry point for a Java program. When a Java program is executed, the Java Virtual Machine (JVM) starts by invoking the main method. Let’s explore some key aspects of the main method.

The main method has a specific signature: public static void main(String[] args). Here’s what each part means:

• public: It indicates that the main method is accessible from anywhere.
• static: It means that the main method belongs to the class itself, not to any specific instance of the class.
• void: It specifies that the main method doesn’t return any value.
• String[] args: It represents the command-line arguments passed to the Java program.

The code inside the main method is where the program’s logic resides. It can perform various tasks, such as initializing variables, calling methods, and controlling the program flow. The args parameter allows you to access the command-line arguments if needed.

To run a Java program, you compile the source code into bytecode using the Java compiler (javac) and then execute it using the Java interpreter (java). The interpreter locates the main method and starts the program execution from there.

The main method is crucial for running Java applications, and it plays a significant role in command-line programs, standalone applications, and even web applications when combined with frameworks like Spring Boot.

Remember that a Java program can have multiple main methods, but only the one with the exact signature mentioned above (public static void main(String[] args)) will be recognized as the entry point.

Understanding the main method is essential for starting your Java programming journey and building executable Java programs.