Používanie zásuvného modulu Java

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Dôležité: Firefox zablokoval automatické spúšťanie Javy kvôli problémom s bezpečnosťou. Ak však niektorým stránkam dôverujete, môžete Javu pre ne povoliť pomocou tohto návodu.

Veľa internetových stránok používa Java applety na zobrazenie interaktívneho obsahu ako napríklad online hier. Predtým, ako Firefox môže spustiť Java applety, musíte Javu správne nainštalovať a povoliť. Java je programovací jazyk, ktorého preložený kód je nezávislý na platforme a je ho možné spúšťať na systémoch Windows, Mac, Linux a iných. Tento článok Vám pomôže Javu nainštalovať alebo aktualizovať a pripraviť na používanie v prehliadači Firefox.

  • Java to isté ako JavaScript (ak se chcete dozvedieť viac o JavaScript-e prečítejte si tento článok).

Inštalácia a aktualizácia Javy

Manuálna inštalácia a aktualizácia

  1. Go to the download page at java.com.
  2. Click the Free Java Download button.
  3. Click the Agree and Start Free Download button to download the Java installer to your computer.
  4. After the download is complete, close Firefox.
  5. Open the file you downloaded to start the Java installation.

Automatická aktualizácia

Java for Windows includes a Java Update feature that periodically checks for updates and notifies you when an update is available for installation.

Poznámka: To eliminate potential security vulnerabilities and to save disk space, you should remove any older Java versions that may still be installed. For more information, visit How do I uninstall Java on my Windows computer ? on java.com.

On Mac OS X 10.6 and below, Java is installed with the operating system.

On Mac OS X 10.7 and above, Java is not installed by default. Java for OS X Lion is available from Apple Support Downloads.

To update Java, use the Mac OS X Software Update feature.

See Java Plugin Install for Linux at oracle.com for help installing or updating Java on your Linux system.

Testovanie Javy

A number of online tools will tell you if Java is installed and enabled in Firefox.

Povolenie Javy

If Java is not working, make sure that the Java plugin is enabled in the Add-ons Manager tab:

  1. Kliknite na tlačidlo ponuky Fx89menuButton. V ponuke kliknite na Doplnky a témy a následne zvoľte Plugins.
  2. Click on the Java (TM) Platform pluginJava Plug-in 2 for NPAPI Browsers (Mac OS 10.5 & 10.6) or Java Applet Plug-in (Mac OS 10.7 and above)Java plugin to select it.
  3. Click on the Enable button (if the button says Disable, Java is already enabled).
Note: You only need to enable the "Java(TM) Platform" plugin, if it is disabled. The "Java Deployment Toolkit" plugin is used by Java developers to detect your Java version and to deploy their Java applications and does not need to be enabled for Java to work.

Riešenie problémov

After enabling Java in your operating system and through your Firefox options, Java may still fail to work properly. To activate Java, try the following:

Odinštalovanie JavaFX (ak bol nainštalovaný)

In some cases, after updating from an earlier Java version to Java 7 Update 10 or above, the Java (TM) Platform plugin is longer detected. This can be caused by a conflict with Java and a standalone installation of JavaFX that prevents the Java plugin from being properly registered. To resolve the problem, uninstall JavaFX. For more information, see this java.com help page.

Remove outdated Java plugin files from the Firefox plugins folder

You may have copied Java plugins to the Firefox plugins folder in the past. Java plugin files from older versions in the Firefox plugins folder can prevent Java from working.

  1. Kliknite na tlačidlo ponuky Fx89menuButton. V ponuke kliknite na Doplnky a témy a následne zvoľte Plugins.
  2. Select the Java(TM) Platform plugin and make sure that it is enabled.
  3. Check if the Java(TM) Platform plugin is correctly detected. For example, if Java 7 Update 11 is currently installed, the Java plugin in the Add-ons Manager tab should be listed as Java(TM) Platform SE 7 U11.
  4. If you find Java plugin files listed that do not match your current Java version, you may have outdated Java plugin files in the Firefox plugins folder which should be removed.

The Firefox plugins folder, if it exists, is typically in the following location:
C:\Program Files\Mozilla Firefox\plugins on 32-bit Windows, C:\Program Files (x86)\Mozilla Firefox\plugins on 64-bit Windows

Other software that may block Java

Even if Java is installed and enabled in Firefox, it may be blocked by other software or Firefox add-ons, such as the following:

  • The ZoneAlarm Pro software firewall can block Java. For more information on enabling Java through this program, see the ZoneAlarm Pro forum.
  • The NoScript extension for Firefox will block Java. For more information, see the NoScript FAQ.

Ďaľšie zdroje

  • Stránka Java FAQ na webe java.com obsahuje odpovede na často kladené otázky.



Založené na informáciach z článku Java (mozillaZine KB)