Install On Windows 10

A school program needs reliable data and clear rules. Install a supported Windows JDK, configure its bin directory in PATH when needed and reopen the terminal. Verify java and javac before compiling a school program.

This tutorial will walk you through the steps for installation of Java on Windows 10.

Visit the official Oracle website: Download Java JDK.

Choose the appropriate version for your system — usually "Windows x64 Installer". Click "Download" and accept the license agreement if prompted.

Locate the downloaded .exe file and double-click to run it. The installation wizard will open.

• Click “Next” on the welcome screen.
• Choose an installation path (or leave the default).
• Click “Next” again to start the installation.
• Once the installation finishes, click “Close”.

To run Java from the command line, you’ll need to set the JAVA_HOME and PATH environment variables.

Set JAVA_HOME

1. Open Control Panel → System and Security → System.
2. Click on Advanced system settings.
3. In the System Properties window, click on Environment Variables.
4. Under “System Variables”, click New:
• Variable name: JAVA_HOME
• Variable value: Path to your JDK folder, e.g., C:\Program Files\Java\jdk-17

Update PATH Variable

1. Still in Environment Variables, find the Path variable under "System Variables". Click Edit.
2. Click New and add: %JAVA_HOME%\bin
3. Click OK on all dialogs to save and exit.

Open Command Prompt and type:

java -version

java version "17.0.1"  
Java(TM) SE Runtime Environment (build 17.0.1+12)  
Java HotSpot(TM) 64-Bit Server VM (build 17.0.1+12, mixed mode)

If you see a version message like above, your installation was successful!

Let’s try a sample program to make sure everything is working fine.

Write the Program

Open Notepad and paste the following:

public class HelloWorld {
  public static void main(String[] args) {
    System.out.println("Java is installed and working!");
  }
}

Save it as HelloWorld.java in a folder of your choice.

Compile the Program

cd path\to\your\file
javac HelloWorld.java

If no error appears, it means the compilation is successful. A file named HelloWorld.class should be created.

Run the Program

java HelloWorld

Java is installed and working!

• 'javac' is not recognized: Check that %JAVA_HOME%\bin is correctly added to the PATH variable.
• Wrong version showing: You may have multiple Java versions. Check your system PATH for older entries and remove them.

You’ve successfully installed Java on Windows 10 and run your first program!

Changing PATH does not update an already-open terminal. The JDK folder and its bin folder serve different configuration purposes.

Before running this Java program, write down each line you expect to see. Identify the value, branch, object or exception responsible for each line. Then explain whether the following assumption is valid: Changing PATH does not update an already-open terminal.

Java 17 · Main.java · complete practice program

public class Main  {
  public static void main(String[] args)  {
    System.out.println(System.getProperty("java.specification.version"));
  }
}

Java 17 · Main.java · source repeated for this answer

public class Main  {
  public static void main(String[] args)  {
    System.out.println(System.getProperty("java.specification.version"));
  }
}

Expected output on the Java 17 teaching runtime; your installed version can differ

17

Install a supported Windows JDK, configure its bin directory in PATH when needed and reopen the terminal. Verify java and javac before compiling a school program.

Changing PATH does not update an already-open terminal. The JDK folder and its bin folder serve different configuration purposes.

Run with javac Main.java, then java Main. The declaration of Main names the class; main starts the example, and println writes a complete output line.

Install a supported Windows JDK, configure its bin directory in PATH when needed and reopen the terminal. Verify java and javac before compiling a school program. Changing PATH does not update an already-open terminal. The JDK folder and its bin folder serve different configuration purposes.

Related explanations: Java Variables, Java If Statement - Syntax and Examples, Java Class - Blueprint of Objects, Exceptions in Java Introduction.

Supporting documentation: Official Java learning guide and Java 17 language specification.