Verifying java is installed

How to verify if java is installed on the computer and get version detail

The best and the easiest way to check if Java is being installed on your system is by using the Command Prompt on Windows or Terminal if you’re on Mac OS X or any other Linux/Unix flavor.

Open Terminal and type the following command :

$ java -versionIf java is being installed on the system you will get a response with the version details,

$ java -version java version "1.8.0_25" Java(TM) SE Runtime Environment (build 1.8.0_25-b17) Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode) $

Open Command Prompt and type the following command,

If it is installed you should get the ver details as the response of the command,

java version "1.7.0_25" Java(TM) SE Runtime Environment (build 1.7.0_25-b15) Java HotSpot(TM) Client VM (build 23.25-b01, mixed mode, sharing)

The other ways to check if Java is installed :

1. Click on Start.
2. Now Select Control Panel

1. Click on Start
2. Now Select Control Panel
3. Now Click on Programs and Features
4. Check if there is Java version included.

1. Goto Control Panel
2. Under Control Panel select Programs
3. Now Click Programs and Features
4. Check if installed Java version is listed.

1. Goto System Preferences (you can do a spotlight search to get there)
2. Check if you can see Java Icon
3. Click on the Java icon
4. Click on About button to get the version details

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How to Check if Java is Installed on Windows 10: Methods and Troubleshooting Tips

Learn how to check if Java is installed on Windows 10 using Control Panel, Command Prompt, About Java utility, directory method, and Java About dialog. Troubleshoot common issues with Java on Windows 10.

• Checking Java installation through Control Panel
• Checking Java installation through Command Prompt
• How To Check Java Version In Windows 10
• Checking Java installation through About Java utility
• Checking Java installation through directory method and Java About dialog
• Troubleshooting Java issues on Windows 10
• Other helpful code examples for verifying Java installation on Windows 10
• Conclusion
• How do I know if Java is installed on Windows 10?
• Where is Java located Windows 10?
• How do I check my Java version Java?

Java is a popular and widely used programming language that has been around for decades. It is used to develop various applications and software across different platforms. If you are a Windows 10 user, it is important to know whether Java is installed on your system or not, as many programs and applications require Java to function properly. In this article, we will discuss different methods to check if java is installed on Windows 10 and provide troubleshooting tips for Java-related issues.

Checking Java installation through Control Panel

The easiest way to check if Java is installed on your Windows 10 system is through the Control Panel. Here is how you can do it:

1. Click on the Start menu and type “Control Panel” in the search bar.
2. Click on “Control Panel” to open it.
3. In the Control Panel, click on “Programs”.
4. Look for the Java icon. If it is present, then Java is installed on your system.
5. If Java is not installed, you can download and install it for free from the official Java website.

Checking Java installation through Command Prompt

Another way to check if Java is installed on your Windows 10 system is through the Command Prompt. Here is how you can do it:

1. Click on the Start menu and type “Command Prompt” in the search bar.
2. Click on “Command Prompt” to open it.
3. Type “java -version” in the Command Prompt and press Enter.
4. The installed version of Java will be displayed.
5. You can also identify the Java version using the java class file disassembler javap.

How To Check Java Version In Windows 10

Checking Java installation through About Java utility

The About Java utility can also be used to find the installed Java version on Windows 10. Here is how you can do it:

1. Click on the Start menu and type “About Java” in the search bar.
2. Click on “About Java” to open it.
3. The installed Java version will be displayed.

Checking Java installation through directory method and Java About dialog

Java can also be checked using the directory method. Here is how you can do it:

1. Open the Windows Explorer and navigate to the directory where Java is installed.
2. If Java is installed, the directory will contain a “bin” directory.
3. Java can also be checked using the Java About dialog.
4. Open any Java application and go to the Help menu.
5. Select “About Java” and the installed Java version will be displayed.

Troubleshooting Java issues on Windows 10

If you are experiencing Java-related issues on your Windows 10 system, here are some troubleshooting tips:

1. verify that java is installed correctly by using the methods discussed above.
2. Check the path to the JDK installation in the Control Panel under Programs.
3. Access Java software installation log files through the Windows Command Prompt .
4. common issues with java include compatibility issues with certain software or applications, security vulnerabilities, and performance issues.

Other helpful code examples for verifying Java installation on Windows 10

In cpp, how to check if java is installed on windows 10 code example

Open cmd and write "java -version" if there is intalled, the details will be displayed

In java, how to see java version in windows 10 code example

In java, check if java is installed windows code example

Conclusion

Java is an essential programming language that is required for many programs and applications to function properly on Windows 10. checking if java is installed on your system can be done through the Control Panel, Command Prompt, About Java utility, directory method, and Java About dialog. Troubleshooting for Java-related issues on Windows 10 should begin by verifying that Java is installed correctly. By following the methods and troubleshooting tips discussed in this article, you should be able to identify and resolve any Java-related issues on your Windows 10 system.

Frequently Asked Questions — FAQs

How can I check if Java is installed on Windows 10?

To check if Java is installed on Windows 10, you can go to the Control Panel and click on Programs, type «Command Prompt» into the search bar and enter «java -version», search for «About Java» in the Windows Start menu, navigate to the directory where Java is installed, or open any Java application and select «About Java» from the Help menu.

What should I do if Java is not installed on my Windows 10 computer?

If Java is not installed on your Windows 10 computer, you can download and install it for free from the official Java website.

How can I troubleshoot Java issues on Windows 10?

To troubleshoot Java issues on Windows 10, you should first verify that Java is installed correctly. You can also check the path to the JDK installation in the Control Panel under Programs and access Java software installation log files through the Windows Command Prompt. Common issues with Java on Windows 10 include compatibility issues with certain software or applications, security vulnerabilities, and performance issues.

How can I identify the installed version of Java on Windows 10?

You can identify the installed version of Java on Windows 10 by using the Control Panel, Command Prompt, About Java utility, directory method, or Java About dialog.

Is Java necessary for Windows 10?

Java is not necessary for Windows 10, but it is required for certain programs and applications to run properly.

Can I uninstall Java from my Windows 10 computer?

Yes, you can uninstall Java from your Windows 10 computer by going to the Control Panel and selecting Programs and Features. Find Java in the list of installed programs, right-click on it, and select Uninstall.

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Verifying java is installed

You can find the Java installation path on Ubuntu using following command:

It will give path of Java installation directory, if you have multiple versions installed, then only the default Java version (set in your system) wll be displayed.

You can find the Java installation path on Ubuntu using following command:

It will give you Java installation path

How to switch Java version

You can have multiple installed versions of JDK on one machine. At any time, You can decide which Java version you want to make default version and should be used from command line automatically. The update-alternatives command is very helpful in switching between JDk versions, it will list all the installed Java versions. From that list, you can select which is the default version, you can want to keep.

sudo update-alternatives --config java

All available Java versions will be listed as shown below, with a sequence number. You can select any Java version using these sequence numbers. An Asterisk (*) mark shows that this Java version is currently being used as default version.

There are n choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ 0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 auto mode * 1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode 2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode 3 /usr/lib/jvm/java-8-oracle/jre/bin/java 1081 manual mode Press to keep current choice[*], or type selection number:

Java version history

The Java language has undergone several changes since JDK 1.0 also as numerous additions of classes and packages to the core library. The evolution of Java language has been governed by the JCP (Java Community Process), which uses JSRs (Java Specification Requests) to specify changes and propose changes, for additions to the Java.
In addition to the language semantics, lots of other changes have been made to the Class Libraries over the years, which has now grown from a couple of hundred classes to over three thousand. Entire new APIs, like Swing and Java2D, are introduced, and lots of of the first JDK 1.0 classes and methods are deprecated.

JDK 14: New hot Features

May 16, 2020

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