write a code for hello world in java

Certainly! Here is a simple Java program that prints "Hello, World!" to the console:

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

### Steps to Run the Code:

1. **Install Java Development Kit (JDK)**: Make sure you have the JDK installed on your computer. You can download it from the [official Oracle website](https://www.oracle.com/java/technologies/javase-jdk11-downloads.html) or use OpenJDK.

2. **Save the Code**: Create a new file named `HelloWorld.java` and paste the above code into it.

3. **Open a Terminal**: Navigate to the directory where you saved the `HelloWorld.java` file.

4. **Compile the Program**: Run the following command to compile the Java program:
   ```
   javac HelloWorld.java
   ```

5. **Run the Program**: After compilation, run the Java program with this command:
   ```
   java HelloWorld
   ```

You should see the output:
```
Hello, World!
``` 

That's it! You've successfully written and executed your first Java program.