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Windows Registry editing for the JVM

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Jire/RegEdit

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README.md

Windows Registry editing on the JVM

compile group: 'org.jire.regedit', name: 'regedit', version: '1.0.0'

dependency> groupId>org.jire.regeditgroupId> artifactId>regeditartifactId> version>1.0.0version> dependency>

String javaHome = HKEY.LOCAL_MACHINE.get("SOFTWARE\\JavaSoft\\Java Development Kit\\1.8", "JavaHome"); System.out.println("Your Java install directory is \"" + javaHome + "\"");

val javaHome = HKEY.LOCAL_MACHINE["SOFTWARE\\JavaSoft\\Java Development Kit\\1.8", "JavaHome"] println("Your Java install directory is \"$javaHome\"")

HKEY.LOCAL_MACHINE.set("SOFTWARE\\JavaSoft\\Java Development Kit\\1.8", "JavaHome", "C:\\Program Files\Java\\jdk1.8.0_112");

HKEY.LOCAL_MACHINE["SOFTWARE\\JavaSoft\\Java Development Kit\\1.8", "JavaHome"] = "C:\\Program Files\Java\\jdk1.8.0_112"

HKEY.LOCAL_MACHINE.createKey("SOFTWARE\\JavaSoft\\Java Development Kit\\1.8\\JavaHome");

HKEY.LOCAL_MACHINE.deleteKey("SOFTWARE\\JavaSoft\\Java Development Kit\\1.8");

HKEY.LOCAL_MACHINE.deleteValue("SOFTWARE\\JavaSoft\\Java Development Kit\\1.8", "JavaHome");

About

Windows Registry editing for the JVM

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Using Java to read / write Windows registry

How to use Java to read / write to the Windows registry?

#1 building

I added David’s original release of Pure java code to allow access to 32-bit parts of the registry from a 64 bit JVM and vice versa. I don’t think there is any other answer to this problem.

• Package from JDK java.util.prefs.WindowsPreferences private class: http : //grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/7-b147/java/util/prefs/WindowsPreferences.java
• JNI: http : //hg.openjdk.java.net/jdk7/jdk7/jdk/file/9b8c96f96a0f/src/windows/native/java/util/WindowsPreferences.c

Note: don’t read anything else here!

#5 building

You don’t actually need a third party package. Windows has the reg utility for all registry operations. To get the command format, go to the DOS property and type:

You can call reg through the Runtime class:

Using the above command, it’s easy to edit the key and add a new one. To read the registry, you need to get the output of reg, which is a bit tricky. This is the code:

import java.io.IOException; import java.io.InputStream; import java.io.StringWriter; /** * @author Oleg Ryaboy, based on work by Miguel Enriquez */ public class WindowsReqistry < /** * * @param location path in the registry * @param key registry key * @return registry value or null if not found */ public static final String readRegistry(String location, String key)< try < // Run reg query, then read output with StreamReader (internal class) Process process = Runtime.getRuntime().exec("reg query " + '"'+ location + "\" /v " + key); StreamReader reader = new StreamReader(process.getInputStream()); reader.start(); process.waitFor(); reader.join(); String output = reader.getResult(); // Output has the following format: // \n\n\n\t\t if( ! output.contains("\t")) < return null; >// Parse out the value String[] parsed = output.split("\t"); return parsed[parsed.length-1]; > catch (Exception e) < return null; >> static class StreamReader extends Thread < private InputStream is; private StringWriter sw= new StringWriter(); public StreamReader(InputStream is) < this.is = is; >public void run() < try < int c; while ((c = is.read()) != -1) sw.write(c); >catch (IOException e) < >> public String getResult() < return sw.toString(); >> public static void main(String[] args) < // Sample usage String value = WindowsReqistry.readRegistry("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\" + "Explorer\\Shell Folders", "Personal"); System.out.println(value); >> 

Added by jbardin on Thu, 19 Mar 2020 10:55:39 +0200

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Источник

Disable Java updater in registry

Java updater ask for downloading new updates. How to disable on many computers in domain this feature? It is this checkbox: But seems to be impossible to uncheck it in registry. I tried: 32-bit:

[HKEY_CURRENT_USER\SOFTWARE\JavaSoft\Java Update\Policy] "EnableJavaUpdate"=dword:00000000 

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft\Java Update\Policy] "EnableJavaUpdate"=dword:00000000 "EnableAutoUpdateCheck"=dword:00000000 "NotifyDownload"=dword:00000001 "NotifyInstall"=dword:00000001 

Problem is, that DWORD EnableJavaUpdate hide tab Update» on JavaControl Panel, but I don’t want to hide this tab, just unselect this checkbox. I tried to uncheck checkbox and visually compare content of registry path. I also tried Sysinternals ProcMonitor, but can’t find place in registry where this information is stored. EDIT: 1.7.0_67 Java on x64 have problem, that EnableJavaUpdate in registry is set to 1 and it doesn’t work (tab Update is not shown). See proof. 1.7.0_51 Java on x64 have problem, that whole registry path is missing in computer. See proof. 1.7.0._51 Java on x86 have path in registry and also Update tab on Configure Java dialog. (I don’t have screenshoot). I need to stop asking for downloading new version and AFTER THAT solving update all Java old versions on all computers.

Источник

How to Turn off Annoying Java Update Notification in Windows?

The “Annoying Java Update notification” in Windows is indicated every time Windows 10 boots or whenever a Java Update is available. One of the solutions to cope with such a limitation can be to uninstall Java from the system, but as many apps and games are dependent on Java, so it is not an authentic approach. Therefore, sort out the faced limitation by simply configuring the settings in the PC/Laptop.

This article will discuss the solution to disable Java update notifications in Windows.

How to Turn off Annoying Java Update Notification in Windows?

To turn off Java update notification in Windows, disable these notifications via the following approaches:

Prior Check: Examine the Operating System Version

Analyze your OS version by simply right-clicking on “This PC” and hitting “Properties”:

After that, view the OS version supported by your system, as indicated below:

Approach 1: Disable Java Updates From “Control Panel”

Java Updates can be disabled from the “Control Panel” directly by switching to the “Java” application and configuring its settings.

Step 1: Open “Control Panel”

Firstly, switch to “Control Panel” via Startup menu:

Now, type “java” in the search bar and navigate to the appeared “Java” app:

Step 2: Disable Checking Updates Automatically

Here, unmark the highlighted checkbox:

In the appeared pop-up, trigger the“Do Not Check” button and hit “Apply-> OK” to get rid of the annoying Java update notification(s):

Approach 2: Disable Java Update Notification Via “Registry Editor”

Configuring the relevant registry value, i.e., “EnableJavaUpdate” can also assist in getting rid of the faced issue. For doing so, utilize the following steps.

Step 1: Open “Registry Editor”

Firstly, type “regedit” in the below-given Run Box to switch to “Registry Editor”:

Step 2: Navigate to “EnableJavaUpdate” Value

Now, navigate to the stated value by following the below-provided path.

For 64-bit OS

For 32-bit OS

Note: In this case, the “64-bit” path is followed.

Step 3: Change the “Value data”

Lastly, change the value of “EnableJavaUpdate” to “0” to disable update notifications:

After applying either of the discussed solutions, the faced annoying limitation will likely resolve.

Conclusion

To turn off annoying Java update notifications in Windows, disable Java Update notifications from the “Control Panel” or disable the “EnableJavaUpdate” value in the “Registry Editor”. This write-up discussed the approaches to disable Java update notification in Windows.

About the author

Umar Hassan

I am a Front-End Web Developer. Being a technical author, I try to learn new things and adapt with them every day. I am passionate to write about evolving software tools and technologies and make it understandable for the end-user.

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