How does Java code run?

1 year ago
Emily Johnson
2 minutes

To run Java code, you need to install the Java Development Kit (JDK) and set up the environment variables. Here are the steps to run Java code:

  1. Download and install JDK: Download the JDK that is suitable for your operating system from the official Oracle website, and follow the installation guide to install it.
  2. Set environment variable: Set the installation path of JDK to the environment variable in the operating system. For specific instructions, please refer to the setting tutorial of the corresponding operating system.
  3. Write Java code: Create a Java source code file with a .java extension using any text editor. For example, create a file named HelloWorld.java and write Java code within it.
public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}
  1. Compile Java code by opening the Command Prompt (Windows) or Terminal (Mac and Linux), navigating to the directory where the Java source code file is saved, and running the following command to compile the Java code:
javac HelloWorld.java

If the compilation is successful, a bytecode file named HelloWorld.class will be generated in the same directory.

  1. Run the Java code: Execute the compiled Java code by typing the following command in Command Prompt (Windows) or Terminal (Mac and Linux).
java HelloWorld

This will print Hello, World! on the console.

Please note that the file names and paths in the above steps may need to be modified according to your specific situation. Ensure that the paths for JDK and the compiled Java files are correct.

I hope this helps you!

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