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قدمهای اساسی برای حل مشکلات جاوا
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قدمهای اساسی برای حل مشکلات جاوا
#1
Basic troubleshooting tips for Java issues If you are having problems related to Java, the following tips should help you getting things working.


» Download and Install Java
» Use Java
» Test Java
» Remove Old Versions of Java
» Find Java
» Always redirected to the java.com download page


[Image: alert_16.png]Chrome browser versions 42 and above. Starting with Chrome version 42 (released April 2015), Chrome has disabled the standard way in which browsers support plugins. More info



Download and Install Java

Try the offline installer package (Windows only)
The offline installer package will often complete successfully even though the online installer package has encountered a problem. The offline installer package file is large and will take longer to download than the online installer.
» Download the Windows Offline installer

Uninstall any non-working Java installations
Remove prior installations of Java that are not working before trying to install again.
» Uninstall Java for Windows
» Uninstall Java for Mac

Temporarily turn off firewall or antivirus clients
Active firewall or antivirus software may prevent Java from installing properly. Remember to turn your firewall or antivirus software back on when you have successfully completed the Java install.

Why do I get file corrupt message during Java installation?
This message is most commonly seen by Windows XP users. Running a Microsoft Fix it utility and trying the offline installer may resolve the issue. See the installshield FAQ for more details.

[Image: ic_tipblue20x20.png]You can test your Java installation using the instructions in the Test Java section below.


Use Java
Once you have determined that Java is installed correctly, try the following items to help you run a particular Java application.

Restart your browser after installing Java to enable the new version
If you are still prompted to update Java after installing the latest version, try restarting your browser. Close all of the browser windows, then reopen any web pages that require Java. In most cases starting a new browser session should make the latest installed version of Java active in your browser.
Note: If you are still prompted to update, try restarting your system. Some systems need a restart to register the newly installed Java plugin.

Give permission to run Java, when prompted by the browser
Browsers will ask for your permission to run the Java plug-in in the browser. The permission prompts vary according to the browser.
» Activate Java plug-in in the browser

Check if the Java plug-in is enabled in the browser
Browsers may disable the Java plug-in or related add-ons by default. You may need to configure your browser to enable the Java plug-in.
» Enable Java plug-in in the browser

Verify that Java is enabled in the Java Control panel
If Java is not enabled in the Java Control Panel, you will be unable to run Java applications in any browser.
» Enable Java content in the browser using the Java Control panel

Configure security settings
Ensure that the Java security level is not preventing the application from running. The default security level may restrict the ability to run applications that may present a risk to your computer.
» Configure security level settings in the Java Control panel

How can I run the applications blocked by Security settings?
The Exception Site List feature was introduced starting with the Java 7 Update 51 release. Adding the application URL to the Exception list allows users to run Rich Internet Applications (RIAs) that would normally be blocked by security checks.
» Configure the Exception Site List

Why am I unable to print coupons or shipping labels?
Some Java applications have not been upgraded to meet new Java security standards. As a result, these apps are blocked thus disabling printing. Contact the website or application developer to notify them of the issue.
» Printing issues FAQ

Clear the Java cache (temporary) files
Sometimes a corrupted file in the Java cache can prevent an application from running. You can safely delete the temporary files that Java downloads since Java will download them again and ensure they are up-to-date.
» Clear the Java cache

Check Antivirus or Firewall settings related to Java
Users should check with antivirus security apps and also firewall settings to see if there are areas to configure Java plugins and if they could add trusted sites.

Verify proxy settings
Ensure that you are using the appropriate proxy settings if they are necessary for your particular internet configuration.
» Set proxy settings in the Java Control panel

Uninstall stand-alone JavaFX installations in Firefox (Windows)
A conflict between Java versions 7u10 and above and previous standalone installations of JavaFX can cause Firefox to not recognize installed Java versions.
» See Firefox issues


Test Java
Ensure that Java is enabled in your browser
Once the Java installation has completed, you can verify that Java is working in your browser. It is possible that Java has been disabled or blocked from running in your browser. How you give permission to run Java varies according to the browser being used.
» Verify that Java is working in your browser


Uninstall Old Versions of Java
Remove all old Java versions to reduce security risks
Keeping old and unsupported versions of Java on your system presents a serious security risk. Uninstalling older versions of Java from your system ensures that Java applications will run with the most up-to-date security and performance improvements.
» Remove old Java versions



Find Java
Options to find installed Java versions
» Use the Verify applet (recommended)
» If you can't run applets, find the Java version using the manual method (Windows and Mac)


Always redirected to Java.com when visiting a page with a Java app.
Install the latest Java version
The continual redirection to java.com was a known issue affecting Java versions 7u25 and older. This issue was fixed with the 7u40 release of Java. To prevent the redirect to java.com, download the latest Java version from http://java.com .
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