Creating your first Java Application

Creating your first Java Application

To create your first java application, you'll need:

1. Java SE Development Kit (JDK)
2. A text editor

Creating a java file

Write the following code in the text editor:

class HelloWorld {

  public static void main(String[] args) {
    System.out.println("Hello World!"); // Display the string.

  }
}

Save this file as HelloWorld.java

Running the file

If the environment variable is not set, set the environment variable (If you don't know how to set the environment variable, go to this link.)

After setting the environment variable, open command prompt.

To open command prompt, press "Win  + R" key and then type cmd and press enter.

To compile your java file, in command prompt type:

  javac "Path to your java file or file name"

eg:

  javac HelloWorld.java

To run your file, type:

    java "Classname"

eg:

  java HelloWOrld