java hello world

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!");
    }
}

In this example, the HelloWorld class has a main method, which is the entry point of a Java program. The main method prints the string "Hello, World!" to the console using the println method of the System.out object.

To run this program, you will need to compile it using the javac command and then run it using the java command.

For example:

javac HelloWorld.java
java HelloWorld

This will compile the HelloWorld.java file and create a HelloWorld.class file, and then run the HelloWorld class. The output of the program will be "Hello, World!" displayed on the console.

You can also use the System.out.print method to print the string to the console without a newline character at the end.

For example:

System.out.print("Hello, World!");

This will print the string "Hello, World!" to the console, followed by the cursor position at the end of the string.