Just great place for everyone

Can you have 2 different versions of Java installed?

Can you have 2 different versions of Java installed?

It is very possible to run multiple versions of Java on the same machine so you can run your existing applications and Ignition at the same time.

Can we have 2 Java versions in Windows?

It is absolutely possible to install side-by-side several JRE/JDK versions. Moreover, you don’t have to do anything special for that to happen, as Sun is creating a different folder for each (under Program Files). There is no control panel to check which JRE works for each application.

Can we have Java 8 and Java 11 together?

I have some software in my server that requires Java 11 to work, but I also have Bamboo in the same server. I know you can install both. Java 8 and Java 11 and keep them at the same time…

Can I have both Java 7 and 8 installed?

Absolutely. You can install and download the latest update for JRE 8 from If you are software developer and would like the latest version of JDK 8 go to the Java SE downloads page on OTN.

How do I install multiple versions of JDK?

  1. Step 1: Install SDKMAN. Open a new terminal and enter curl -s “” | bash.
  2. Step 2: List available JDKs. See the available Java versions offered by SDKMAN by giving the following command sdk list java.
  3. Step 3: Install parallel JDKs.
  4. Step 4: Switch between JDKs.
  5. Step 5: Uninstall a JDK.

Can we install two JDK in Windows?

You can install multiple JDK and JRE but each one should to have its own separate folder, the default should be usually ok.

How do I uninstall Java 11 and install Java 8?

Click Start, point to Settings, and then click the Control Panel. In the Control Panel, double-click the Add/Remove Programs. On the Install/Uninstall tab, click the Java version you want to uninstall, and then click Add/Remove.

Can I keep 2 JDK installed?

Yes, you can. Just use full path names when invoking javac , java , etc. or set your PATH environment variable to point to the appropriate jdk/bin location. The IDEs usually allow defining multiple JDKs/JREs, and you can choose which one to use for every project.

Can we set 2 Java_home?

Installing different versions is no problem, as long as you set CLASSPATH, JAVA_HOME and the PATH to the correct version. In Eclipse, it’s just a matter of telling your IDE which one to choose. In the settings, check the Java/Installed JRE’s options. You can add JREs you have installed.

How do I upgrade Java from 1.8 to 11?

Steps to migrate from jdk-8 to

  1. upgrade build tools.
  2. Add missing Java dependencies in jdk11.
  3. Remove findbug and add Spotbugs.
  4. Changes in GC options. Runtime GC log changes. GC info.
  5. Fork-join Thread pool.
  6. Class-Loader.
  7. IDE-setup.

How can I run Java 8 and Java 11 on Windows?


  1. Install both/all versions of Java you will want to use – for this tutorial it will be just 8 & 11.
  2. Make sure there is no “default” version – we don’t want “any” version running by default.
  3. Set the appropriate envronment variables to start Java 8 or Java 11.
  4. Start the appropriate version or myrobotlab.

Is JDK 1.8 is same as JDK 8?

Equivalences. When the version string for the product is reported as “java version 1.8. 0_5”, the product will be called JDK 8u5, JDK 8 update 5 or, when the update version is not important, JDK 8.

Can we set two Java_home?

What is the difference between JRE and JDK?

The JRE is an abbreviation for Java Runtime Environment. The JVM is an abbreviation for Java Virtual Machine. The JDK (Java Development Kit) is a software development kit that develops applications in Java. Along with JRE, the JDK also consists of various development tools (Java Debugger, JavaDoc, compilers, etc.)

How do I completely remove Java from Windows 7?

Uninstall java Windows 7

  1. Go to the Windows Start Button and select Control Panel.
  2. Click Programs & Features in the Control Panel list.
  3. Find Java in the list and uninstall it.

How do I remove old versions of Java?

Manual Uninstall

  1. Click Start.
  2. Select Settings.
  3. Select System.
  4. Select Apps & features.
  5. Select the program to uninstall and then click its Uninstall button.
  6. Respond to the prompts to complete the uninstall.

How do I manage multiple Java versions in Windows?

How to Change Java Versions in Windows (Updated for Java 18)

  1. Step 1: Installing Multiple Java Versions. Installing multiple Java versions in parallel is incredibly easy in Windows.
  2. Step 2: Define Java Environment Variables.
  3. Step 3: Install the Scripts to Change the Java Version.
  4. Step 4: Add the Script Directory to the Path.

How do I run multiple versions of Java?

Can we run two JVM on same machine?

Yes, you can run multiple JVM’s on a single machine.

What is the difference between Java 8 and Java 11?

There are several reasons why one should upgrade from Java 8 to Java 11. Applications written in Java 9, 10, and 11 are significantly faster and more secure than previous versions of the language. ZGC and Epsilon garbage collectors have improved Garbage Collection.

Is Java 11 backwards compatible?

Java 11 is backwards compatible with Java 8. So you can swiftly change from Java 8 to 11. If you use some of the packages below, all you need to do is add the replacement dependency to your project. Also, Applets and Java Web Start are completely removed without a replacement.

How do I install JDK on Windows 7?

1. How To Install JDK on Windows

  1. Step 0: Un-Install Older Version(s) of JDK/JRE.
  2. Step 1: Download JDK.
  3. Step 2: Install JDK.
  4. Step 3: (SKIP for JDK 17, 16, 16 – kept for completeness) Include JDK’s ” bin ” Directory in the PATH.
  5. Step 4: Verify the JDK Installation.
  6. Step 5: Write a Hello-World Java Program.

How do I install Java on Windows 7?

Install Java on Windows 7

  1. Step 1: Go to JDK 14 Release Page.
  2. Step 2: Unzip the downloaded ZIP file (jdk-14.0.
  3. Step 3: Setting up environment variables so that we can execute java commands from the command prompt.
  4. JAVA_HOME=C:\Program Files\jdk-14.0.1.
  5. Step 4: Now we can run java commands from the command prompt.

Is JDK 1.8 still free?

You can download the latest OpenJDK release of Java from Oracle, for free, under an open source license from Oracle JDK 8 and Oracle JDK 11 are free for Personal, Development and other uses. Oracle JDK 17 and later release are available under a Oracle No-Fee Terms and Conditions License for all users.

What is difference between Java 1.8 and Java 11?

Let’s understand the difference between both versions of Java on the basis of deprecations. These are the following deprecations which are done in between Java 8 and Java 11. In Java 11, the support for Java browser plugins is removed and due to which the Applet API has been deprecated.