Certainly! A simple "Hello, World!" program in Java looks like this:

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

### Explanation:

1. **public class HelloWorld**: This line defines a public class named `HelloWorld`. In Java, every application must have at least one class definition.

2. **public static void main(String[] args)**: This method is the entry point of any Java application. When you run the program, the Java Virtual Machine (JVM) looks for the `main` method to start the execution.

3. **System.out.println("Hello, World!");**: This line prints the string "Hello, World!" to the console.

### How to Run the Program:

1. **Save the Code**: Save the code in a file named `HelloWorld.java`.

2. **Compile the Program**: Open a terminal or command prompt, navigate to the directory where the file is saved, and compile the program using:
```bash
javac HelloWorld.java
```

3. **Run the Program**: After compiling, run the program using:
```bash
java HelloWorld
```

You should see the output:
```
Hello, World!
```
That's it! You've successfully created and run a simple Java program.
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