First Java Program

 How to write first program in java

// Your First Program

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

output

Hello, World!

Explanation

Note: If you have compiled the exact code, you need to save the file as HelloWord.java. It's because the name of the class and file name should match in Java.