hello world in java

"Hello, World!" is a simple program that is often used to introduce a programming language. In Java, you can write a "Hello, World!" program using the System.out.println() method, which prints a string to the console.

Here's an example of a "Hello, World!" program in Java:

public class Main {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

This code defines a main() method, which is the entry point of a Java program. It then uses the System.out.println() method to print the string "Hello, World!" to the console.

To run this program, you can use a Java compiler to compile the code into a Java class file, and then run the class file using the java command. For example, you can compile the code using the javac command:

javac Main.java

This will create a Main.class file in the same directory. You can then run the class file using the java command:

java Main

This will execute the main() method of the Main class, and print "Hello, World!" to the console.

For more information about writing and running Java programs, you can refer to the Java documentation (https://docs.oracle.com/en/java/).