How Install JAVA JDK 22 in Windows 11 - Hindi

[@sanjeevkumar-pv3qg]

Thanks for making it too simple for others.

[@Bharatiya_Indian]

Glad it was helpful!

[@UshaRawat-ps1uy]

Sir mera to path ka option hi nahi aa rha edit ka system me please help sir

[@Moneyearningtip274]

Hlo sir mera error ho ja raha h please help kariye

[@NishantChauhan-rm9sl]

public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
}

[@Bharatiya_Indian]

???

[@AnjaliSingh-lg2np]

Java version check krne pr Java.lang.classNotFound error aa rha

[@Bharatiya_Indian]

If you're encountering a java.lang.ClassNotFoundException error when checking the Java version, it usually indicates that there might be an issue with the Java installation or environment variables. Let's go through some troubleshooting steps to resolve this issue.
1. Verify Java Installation
Ensure that Java is correctly installed on your system. Open a command prompt and type:
sh
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java -version
You should see something like:
scss
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java version "1.8.0_231"
Java(TM) SE Runtime Environment (build 1.8.0_231-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.231-b11, mixed mode)
2. Check Java Compiler Version
Similarly, check the Java compiler (javac) version:
sh
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javac -version
You should see:
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javac 1.8.0_231
3. Set JAVA_HOME Environment Variable
Ensure the JAVA_HOME environment variable is set correctly. Here's how you can set it:
Windows:
Right-click on This PC or My Computer and select Properties.
Click on Advanced system settings.
Click on Environment Variables.
Under System variables, click New and add a variable JAVA_HOME with the path to your JDK installation, for example: C:\Program Files\Java\jdk1.8.0_231.
Find the Path variable, and append %JAVA_HOME%\bin to it.
Linux/Mac:
Add the following lines to your .bashrc, .bash_profile, or .zshrc file (depending on your shell):
sh
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export JAVA_HOME=/path/to/your/jdk
export PATH=$JAVA_HOME/bin:$PATH
Then, reload the file:
sh
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source ~/.bashrc
# or
source ~/.bash_profile
# or
source ~/.zshrc
4. Ensure Correct Classpath
If you are trying to run a specific Java program and getting java.lang.ClassNotFoundException, ensure that the classpath is set correctly. The classpath should include all directories and JAR files that contain the classes you are trying to load.
Running a Java program:
sh
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java -cp .;path/to/your/classes;path/to/your/jars YourMainClass
# For Linux/Mac use : instead of ;
java -cp .:path/to/your/classes:path/to/your/jars YourMainClass
5. Check for Multiple Java Installations
If you have multiple versions of Java installed, there might be a conflict. Ensure that the version you want to use is first in your system PATH.
Windows:
Open Control Panel > Programs > Java > Java.
Under the Java tab, view the installed versions and ensure the correct version is enabled.
Linux/Mac:
Check the installed Java versions and their paths:
sh
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update-alternatives --config java
# or
which java
6. Reinstall Java
If the above steps don't work, consider reinstalling Java. Uninstall the existing Java installation, download the latest version from the official Java website, and install it.
Example of Checking Java Version in Code
If you are trying to check the Java version programmatically and getting a ClassNotFoundException, ensure your code is correct:
java
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public class JavaVersionCheck {
public static void main(String[] args) {
String version = System.getProperty("java.version");
System.out.println("Java version: " + version);
}
}
Compile and run:
sh
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javac JavaVersionCheck.java
java JavaVersionCheck
You should see the Java version printed out.
By following these steps, you should be able to resolve the java.lang.ClassNotFoundException and correctly check your Java version. If you continue to face issues, please provide more details about the exact command or code you are using.