Hello! To write a "Hello World" program in Java, you can use the following code: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } } This program defines a class called `HelloWorld` with a `main` method. The `main` method is the entry point of the program, and it simply prints "Hello, World!" to the console using the `System.out.println` method.