installation of java and Execution of first Java program

installation of java and Execution of first Java program
The Java Development Kit (JDK) is software used for Java programming, along with the Java Virtual Machine (JVM) and the Java Runtime Environment (JRE). The JDK includes the compiler and class libraries, allowing developers to create Java programs executable by the JVM and JRE.
Open a command prompt by typing cmd in the search bar and press Enter.
Run the following command:
java -version
The command outputs the Java version on your system. If Java isn't installed, the output is a message stating that Java isn't recognized as an internal or external command.
Download the latest Java Development Kit installation file for Windows 10 to have the latest features and bug fixes.

Using your preferred web browser, navigate to the Oracle Java Downloads page.
On the Downloads page, click the x64 Installer download link under the Windows category. At the time of writing this article, Java version 17 is the latest long-term support Java version.
Step 1: Run the Downloaded File
Double-click the downloaded file to start the installation.

Step 2: Configure the Installation Wizard
After running the installation file, the installation wizard welcome screen appears.

1. Click Next to proceed to the next step.
2. Choose the destination folder for the Java installation files or stick to the default path. Click Next to proceed.
3. Wait for the wizard to finish the installation process until the Successfully Installed message appears. Click Close to exit the wizard.
Step 1: Add Java to System Variables
1. Open the Start menu and search for environment variables.

2. Select the Edit the system environment variables result.
3. In the System Properties window, under the Advanced tab, click Environment Variables…
4. Under the System variables category, select the Path variable and click Edit:
5. Click the New button and enter the path to the Java bin directory:
6. Click OK to save the changes and exit the variable editing window.

Step 2: Add JAVA_HOME Variable
Some applications require the JAVA_HOME variable. Follow the steps below to create the variable:

1. In the Environment Variables window, under the System variables category, click the New… button to create a new variable.
2. Name the variable as JAVA_HOME.

3. In the variable value field, paste the path to your Java jdk directory and click OK.
4. Confirm the changes by clicking OK in the Environment Variables and System properties windows.
Test the Java Installation
Run the java -version command in the command prompt to make sure Java installed correctly:
If installed correctly, the command outputs the Java version.