How do I run Java applets? [duplicate]

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This question already has an answer here:



  • Why is the Java plugin (JRE) disabled in Chrome?

    3 answers



Is there a way to run a Java applet on Chrome or Firefox? I get the error message on the Java test page that Java won't run on Chrome or Firefox anymore because of the non-supported NPAPI.



I have an old set of *.class files with an .html to run it, and I just want to be able to run this applet somehow. But how?










share|improve this question















marked as duplicate by sleske, Dave M, music2myear, LotPings, bertieb Jan 19 at 22:33


This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.






















    12
















    This question already has an answer here:



    • Why is the Java plugin (JRE) disabled in Chrome?

      3 answers



    Is there a way to run a Java applet on Chrome or Firefox? I get the error message on the Java test page that Java won't run on Chrome or Firefox anymore because of the non-supported NPAPI.



    I have an old set of *.class files with an .html to run it, and I just want to be able to run this applet somehow. But how?










    share|improve this question















    marked as duplicate by sleske, Dave M, music2myear, LotPings, bertieb Jan 19 at 22:33


    This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.




















      12












      12








      12


      3







      This question already has an answer here:



      • Why is the Java plugin (JRE) disabled in Chrome?

        3 answers



      Is there a way to run a Java applet on Chrome or Firefox? I get the error message on the Java test page that Java won't run on Chrome or Firefox anymore because of the non-supported NPAPI.



      I have an old set of *.class files with an .html to run it, and I just want to be able to run this applet somehow. But how?










      share|improve this question

















      This question already has an answer here:



      • Why is the Java plugin (JRE) disabled in Chrome?

        3 answers



      Is there a way to run a Java applet on Chrome or Firefox? I get the error message on the Java test page that Java won't run on Chrome or Firefox anymore because of the non-supported NPAPI.



      I have an old set of *.class files with an .html to run it, and I just want to be able to run this applet somehow. But how?





      This question already has an answer here:



      • Why is the Java plugin (JRE) disabled in Chrome?

        3 answers







      google-chrome firefox java






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Jan 17 at 16:29









      vaxquis

      264312




      264312










      asked Jan 16 at 15:49









      jerrrrrojerrrrro

      634




      634




      marked as duplicate by sleske, Dave M, music2myear, LotPings, bertieb Jan 19 at 22:33


      This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.









      marked as duplicate by sleske, Dave M, music2myear, LotPings, bertieb Jan 19 at 22:33


      This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.






















          2 Answers
          2






          active

          oldest

          votes


















          20














          Is there a way to run a Java applet on Chrome or Firefox?



          No. Applets are no longer supported in Firefox or Chrome.




          Firefox no longer provides NPAPI support (technology required for Java applets)



          As of September, 2018, Firefox no longer offers a version which
          supports NPAPI, the technology required to run Java applets. The Java
          Plugin for web browsers relies on the cross-platform plugin
          architecture NPAPI, which had been supported by all major web browsers
          for over a decade. The 64 bit version of Firefox has never supported
          NPAPI, and Firefox version 52ESR is the last release to support the
          technology. It is below the security baseline, and no longer
          supported.




          Source Java and Firefox Browser




          Chrome no longer supports NPAPI (technology required for Java applets)



          The Java Plugin for web browsers relies on the cross-platform plugin architecture NPAPI, which had been supported by all major web browsers for over a decade. Google's Chrome version 45 and above have dropped support for NPAPI, and therefore Java Plugin do not work on these browsers anymore.




          Source Java and Google Chrome Browser




          So how do I run Java applets?



          Use the AppletViewer, from a JDK before Java SE 11.




          The appletviewer command allows you to run applets outside of a web
          browser.



          SYNOPSIS



          appletviewer [ options ] urls ...


          DESCRIPTION



          The appletviewer command connects to the documents or resources
          designated by urls and displays each applet referenced by the
          documents in its own window. Note: if the documents referred to by
          urls do not reference any applets with the OBJECT, EMBED, or APPLET
          tag, then appletviewer does nothing. For details on the HTML tags that
          appletviewer supports, see AppletViewer Tags.



          Note: The appletviewer is intended for development purposes only.




          Source appletviewer - The Java Applet Viewer



          Alternatively read the Oracle White Paper (pdf) Migrating from Java Applets to plugin free Java technologies, which recommends Java Web Start:




          Java Web Start has been included in the Oracle JRE since 2001 and is
          launched automatically when a Java application using Java Web Start
          technology is downloaded for the first time. The conversion of an
          applet to a Java Web Start application provides the ability to launch
          and update the resulting application without relying on a web browser




          See What is Java Web Start and how is it launched? for more information.



          Note that both Java Applets and Java Web Start were removed completely in
          Java SE 11 (release September 2018). From that version on there is no (supported) way to run Applets or Web Start applications.






          share|improve this answer




















          • 3





            So how do I run Java applets? :-)

            – jerrrrro
            Jan 16 at 16:35






          • 3





            @jerrrrro Run the applets with an outdated browser in a virtual machine.

            – dsstorefile1
            Jan 16 at 16:44






          • 3





            Note even webstart is dropped in java 11 and the 'official' way is now to use j9+ modules to create 'lean' downloadable apps although j8 remains supported for 'deployment' = webstart for a few more years

            – dave_thompson_085
            Jan 17 at 0:26






          • 8





            @jerrrrro: apparently you missed the last decade and a half, when Java sandbox (= applet/webstart) bugs were one of the biggest and most frequent vectors for system infections and breaches. Every few weeks all the security websites announced "huge danger from browser java! remove java from all your systems NOW!", a few weeks later "okay, Sun/Oracle patched that one", a few weeks later "ANOTHER huge danger from java!". The browser makers got tired of this and removed support permanently, so Oracle made the best of it: "we didn't really want to run in browsers anymore"

            – dave_thompson_085
            Jan 17 at 0:32






          • 4





            @jerrrrro, also, Java applets (and Flash applets) were obsoleted by HTML5 and various WebApis, which allows actual integration into the page as a whole rather than just an embedded box with basically no legal interaction with the rest of the content.

            – Jan Hudec
            Jan 17 at 7:06


















          4














          If you already have the files on your machine, you can try the appletviewer that (used to? still does?) ships with the JDK (Java Development Kit).






          share|improve this answer





























            2 Answers
            2






            active

            oldest

            votes








            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            20














            Is there a way to run a Java applet on Chrome or Firefox?



            No. Applets are no longer supported in Firefox or Chrome.




            Firefox no longer provides NPAPI support (technology required for Java applets)



            As of September, 2018, Firefox no longer offers a version which
            supports NPAPI, the technology required to run Java applets. The Java
            Plugin for web browsers relies on the cross-platform plugin
            architecture NPAPI, which had been supported by all major web browsers
            for over a decade. The 64 bit version of Firefox has never supported
            NPAPI, and Firefox version 52ESR is the last release to support the
            technology. It is below the security baseline, and no longer
            supported.




            Source Java and Firefox Browser




            Chrome no longer supports NPAPI (technology required for Java applets)



            The Java Plugin for web browsers relies on the cross-platform plugin architecture NPAPI, which had been supported by all major web browsers for over a decade. Google's Chrome version 45 and above have dropped support for NPAPI, and therefore Java Plugin do not work on these browsers anymore.




            Source Java and Google Chrome Browser




            So how do I run Java applets?



            Use the AppletViewer, from a JDK before Java SE 11.




            The appletviewer command allows you to run applets outside of a web
            browser.



            SYNOPSIS



            appletviewer [ options ] urls ...


            DESCRIPTION



            The appletviewer command connects to the documents or resources
            designated by urls and displays each applet referenced by the
            documents in its own window. Note: if the documents referred to by
            urls do not reference any applets with the OBJECT, EMBED, or APPLET
            tag, then appletviewer does nothing. For details on the HTML tags that
            appletviewer supports, see AppletViewer Tags.



            Note: The appletviewer is intended for development purposes only.




            Source appletviewer - The Java Applet Viewer



            Alternatively read the Oracle White Paper (pdf) Migrating from Java Applets to plugin free Java technologies, which recommends Java Web Start:




            Java Web Start has been included in the Oracle JRE since 2001 and is
            launched automatically when a Java application using Java Web Start
            technology is downloaded for the first time. The conversion of an
            applet to a Java Web Start application provides the ability to launch
            and update the resulting application without relying on a web browser




            See What is Java Web Start and how is it launched? for more information.



            Note that both Java Applets and Java Web Start were removed completely in
            Java SE 11 (release September 2018). From that version on there is no (supported) way to run Applets or Web Start applications.






            share|improve this answer




















            • 3





              So how do I run Java applets? :-)

              – jerrrrro
              Jan 16 at 16:35






            • 3





              @jerrrrro Run the applets with an outdated browser in a virtual machine.

              – dsstorefile1
              Jan 16 at 16:44






            • 3





              Note even webstart is dropped in java 11 and the 'official' way is now to use j9+ modules to create 'lean' downloadable apps although j8 remains supported for 'deployment' = webstart for a few more years

              – dave_thompson_085
              Jan 17 at 0:26






            • 8





              @jerrrrro: apparently you missed the last decade and a half, when Java sandbox (= applet/webstart) bugs were one of the biggest and most frequent vectors for system infections and breaches. Every few weeks all the security websites announced "huge danger from browser java! remove java from all your systems NOW!", a few weeks later "okay, Sun/Oracle patched that one", a few weeks later "ANOTHER huge danger from java!". The browser makers got tired of this and removed support permanently, so Oracle made the best of it: "we didn't really want to run in browsers anymore"

              – dave_thompson_085
              Jan 17 at 0:32






            • 4





              @jerrrrro, also, Java applets (and Flash applets) were obsoleted by HTML5 and various WebApis, which allows actual integration into the page as a whole rather than just an embedded box with basically no legal interaction with the rest of the content.

              – Jan Hudec
              Jan 17 at 7:06















            20














            Is there a way to run a Java applet on Chrome or Firefox?



            No. Applets are no longer supported in Firefox or Chrome.




            Firefox no longer provides NPAPI support (technology required for Java applets)



            As of September, 2018, Firefox no longer offers a version which
            supports NPAPI, the technology required to run Java applets. The Java
            Plugin for web browsers relies on the cross-platform plugin
            architecture NPAPI, which had been supported by all major web browsers
            for over a decade. The 64 bit version of Firefox has never supported
            NPAPI, and Firefox version 52ESR is the last release to support the
            technology. It is below the security baseline, and no longer
            supported.




            Source Java and Firefox Browser




            Chrome no longer supports NPAPI (technology required for Java applets)



            The Java Plugin for web browsers relies on the cross-platform plugin architecture NPAPI, which had been supported by all major web browsers for over a decade. Google's Chrome version 45 and above have dropped support for NPAPI, and therefore Java Plugin do not work on these browsers anymore.




            Source Java and Google Chrome Browser




            So how do I run Java applets?



            Use the AppletViewer, from a JDK before Java SE 11.




            The appletviewer command allows you to run applets outside of a web
            browser.



            SYNOPSIS



            appletviewer [ options ] urls ...


            DESCRIPTION



            The appletviewer command connects to the documents or resources
            designated by urls and displays each applet referenced by the
            documents in its own window. Note: if the documents referred to by
            urls do not reference any applets with the OBJECT, EMBED, or APPLET
            tag, then appletviewer does nothing. For details on the HTML tags that
            appletviewer supports, see AppletViewer Tags.



            Note: The appletviewer is intended for development purposes only.




            Source appletviewer - The Java Applet Viewer



            Alternatively read the Oracle White Paper (pdf) Migrating from Java Applets to plugin free Java technologies, which recommends Java Web Start:




            Java Web Start has been included in the Oracle JRE since 2001 and is
            launched automatically when a Java application using Java Web Start
            technology is downloaded for the first time. The conversion of an
            applet to a Java Web Start application provides the ability to launch
            and update the resulting application without relying on a web browser




            See What is Java Web Start and how is it launched? for more information.



            Note that both Java Applets and Java Web Start were removed completely in
            Java SE 11 (release September 2018). From that version on there is no (supported) way to run Applets or Web Start applications.






            share|improve this answer




















            • 3





              So how do I run Java applets? :-)

              – jerrrrro
              Jan 16 at 16:35






            • 3





              @jerrrrro Run the applets with an outdated browser in a virtual machine.

              – dsstorefile1
              Jan 16 at 16:44






            • 3





              Note even webstart is dropped in java 11 and the 'official' way is now to use j9+ modules to create 'lean' downloadable apps although j8 remains supported for 'deployment' = webstart for a few more years

              – dave_thompson_085
              Jan 17 at 0:26






            • 8





              @jerrrrro: apparently you missed the last decade and a half, when Java sandbox (= applet/webstart) bugs were one of the biggest and most frequent vectors for system infections and breaches. Every few weeks all the security websites announced "huge danger from browser java! remove java from all your systems NOW!", a few weeks later "okay, Sun/Oracle patched that one", a few weeks later "ANOTHER huge danger from java!". The browser makers got tired of this and removed support permanently, so Oracle made the best of it: "we didn't really want to run in browsers anymore"

              – dave_thompson_085
              Jan 17 at 0:32






            • 4





              @jerrrrro, also, Java applets (and Flash applets) were obsoleted by HTML5 and various WebApis, which allows actual integration into the page as a whole rather than just an embedded box with basically no legal interaction with the rest of the content.

              – Jan Hudec
              Jan 17 at 7:06













            20












            20








            20







            Is there a way to run a Java applet on Chrome or Firefox?



            No. Applets are no longer supported in Firefox or Chrome.




            Firefox no longer provides NPAPI support (technology required for Java applets)



            As of September, 2018, Firefox no longer offers a version which
            supports NPAPI, the technology required to run Java applets. The Java
            Plugin for web browsers relies on the cross-platform plugin
            architecture NPAPI, which had been supported by all major web browsers
            for over a decade. The 64 bit version of Firefox has never supported
            NPAPI, and Firefox version 52ESR is the last release to support the
            technology. It is below the security baseline, and no longer
            supported.




            Source Java and Firefox Browser




            Chrome no longer supports NPAPI (technology required for Java applets)



            The Java Plugin for web browsers relies on the cross-platform plugin architecture NPAPI, which had been supported by all major web browsers for over a decade. Google's Chrome version 45 and above have dropped support for NPAPI, and therefore Java Plugin do not work on these browsers anymore.




            Source Java and Google Chrome Browser




            So how do I run Java applets?



            Use the AppletViewer, from a JDK before Java SE 11.




            The appletviewer command allows you to run applets outside of a web
            browser.



            SYNOPSIS



            appletviewer [ options ] urls ...


            DESCRIPTION



            The appletviewer command connects to the documents or resources
            designated by urls and displays each applet referenced by the
            documents in its own window. Note: if the documents referred to by
            urls do not reference any applets with the OBJECT, EMBED, or APPLET
            tag, then appletviewer does nothing. For details on the HTML tags that
            appletviewer supports, see AppletViewer Tags.



            Note: The appletviewer is intended for development purposes only.




            Source appletviewer - The Java Applet Viewer



            Alternatively read the Oracle White Paper (pdf) Migrating from Java Applets to plugin free Java technologies, which recommends Java Web Start:




            Java Web Start has been included in the Oracle JRE since 2001 and is
            launched automatically when a Java application using Java Web Start
            technology is downloaded for the first time. The conversion of an
            applet to a Java Web Start application provides the ability to launch
            and update the resulting application without relying on a web browser




            See What is Java Web Start and how is it launched? for more information.



            Note that both Java Applets and Java Web Start were removed completely in
            Java SE 11 (release September 2018). From that version on there is no (supported) way to run Applets or Web Start applications.






            share|improve this answer















            Is there a way to run a Java applet on Chrome or Firefox?



            No. Applets are no longer supported in Firefox or Chrome.




            Firefox no longer provides NPAPI support (technology required for Java applets)



            As of September, 2018, Firefox no longer offers a version which
            supports NPAPI, the technology required to run Java applets. The Java
            Plugin for web browsers relies on the cross-platform plugin
            architecture NPAPI, which had been supported by all major web browsers
            for over a decade. The 64 bit version of Firefox has never supported
            NPAPI, and Firefox version 52ESR is the last release to support the
            technology. It is below the security baseline, and no longer
            supported.




            Source Java and Firefox Browser




            Chrome no longer supports NPAPI (technology required for Java applets)



            The Java Plugin for web browsers relies on the cross-platform plugin architecture NPAPI, which had been supported by all major web browsers for over a decade. Google's Chrome version 45 and above have dropped support for NPAPI, and therefore Java Plugin do not work on these browsers anymore.




            Source Java and Google Chrome Browser




            So how do I run Java applets?



            Use the AppletViewer, from a JDK before Java SE 11.




            The appletviewer command allows you to run applets outside of a web
            browser.



            SYNOPSIS



            appletviewer [ options ] urls ...


            DESCRIPTION



            The appletviewer command connects to the documents or resources
            designated by urls and displays each applet referenced by the
            documents in its own window. Note: if the documents referred to by
            urls do not reference any applets with the OBJECT, EMBED, or APPLET
            tag, then appletviewer does nothing. For details on the HTML tags that
            appletviewer supports, see AppletViewer Tags.



            Note: The appletviewer is intended for development purposes only.




            Source appletviewer - The Java Applet Viewer



            Alternatively read the Oracle White Paper (pdf) Migrating from Java Applets to plugin free Java technologies, which recommends Java Web Start:




            Java Web Start has been included in the Oracle JRE since 2001 and is
            launched automatically when a Java application using Java Web Start
            technology is downloaded for the first time. The conversion of an
            applet to a Java Web Start application provides the ability to launch
            and update the resulting application without relying on a web browser




            See What is Java Web Start and how is it launched? for more information.



            Note that both Java Applets and Java Web Start were removed completely in
            Java SE 11 (release September 2018). From that version on there is no (supported) way to run Applets or Web Start applications.







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited Jan 17 at 9:50









            sleske

            17.9k85382




            17.9k85382










            answered Jan 16 at 15:55









            DavidPostillDavidPostill

            105k25227260




            105k25227260







            • 3





              So how do I run Java applets? :-)

              – jerrrrro
              Jan 16 at 16:35






            • 3





              @jerrrrro Run the applets with an outdated browser in a virtual machine.

              – dsstorefile1
              Jan 16 at 16:44






            • 3





              Note even webstart is dropped in java 11 and the 'official' way is now to use j9+ modules to create 'lean' downloadable apps although j8 remains supported for 'deployment' = webstart for a few more years

              – dave_thompson_085
              Jan 17 at 0:26






            • 8





              @jerrrrro: apparently you missed the last decade and a half, when Java sandbox (= applet/webstart) bugs were one of the biggest and most frequent vectors for system infections and breaches. Every few weeks all the security websites announced "huge danger from browser java! remove java from all your systems NOW!", a few weeks later "okay, Sun/Oracle patched that one", a few weeks later "ANOTHER huge danger from java!". The browser makers got tired of this and removed support permanently, so Oracle made the best of it: "we didn't really want to run in browsers anymore"

              – dave_thompson_085
              Jan 17 at 0:32






            • 4





              @jerrrrro, also, Java applets (and Flash applets) were obsoleted by HTML5 and various WebApis, which allows actual integration into the page as a whole rather than just an embedded box with basically no legal interaction with the rest of the content.

              – Jan Hudec
              Jan 17 at 7:06












            • 3





              So how do I run Java applets? :-)

              – jerrrrro
              Jan 16 at 16:35






            • 3





              @jerrrrro Run the applets with an outdated browser in a virtual machine.

              – dsstorefile1
              Jan 16 at 16:44






            • 3





              Note even webstart is dropped in java 11 and the 'official' way is now to use j9+ modules to create 'lean' downloadable apps although j8 remains supported for 'deployment' = webstart for a few more years

              – dave_thompson_085
              Jan 17 at 0:26






            • 8





              @jerrrrro: apparently you missed the last decade and a half, when Java sandbox (= applet/webstart) bugs were one of the biggest and most frequent vectors for system infections and breaches. Every few weeks all the security websites announced "huge danger from browser java! remove java from all your systems NOW!", a few weeks later "okay, Sun/Oracle patched that one", a few weeks later "ANOTHER huge danger from java!". The browser makers got tired of this and removed support permanently, so Oracle made the best of it: "we didn't really want to run in browsers anymore"

              – dave_thompson_085
              Jan 17 at 0:32






            • 4





              @jerrrrro, also, Java applets (and Flash applets) were obsoleted by HTML5 and various WebApis, which allows actual integration into the page as a whole rather than just an embedded box with basically no legal interaction with the rest of the content.

              – Jan Hudec
              Jan 17 at 7:06







            3




            3





            So how do I run Java applets? :-)

            – jerrrrro
            Jan 16 at 16:35





            So how do I run Java applets? :-)

            – jerrrrro
            Jan 16 at 16:35




            3




            3





            @jerrrrro Run the applets with an outdated browser in a virtual machine.

            – dsstorefile1
            Jan 16 at 16:44





            @jerrrrro Run the applets with an outdated browser in a virtual machine.

            – dsstorefile1
            Jan 16 at 16:44




            3




            3





            Note even webstart is dropped in java 11 and the 'official' way is now to use j9+ modules to create 'lean' downloadable apps although j8 remains supported for 'deployment' = webstart for a few more years

            – dave_thompson_085
            Jan 17 at 0:26





            Note even webstart is dropped in java 11 and the 'official' way is now to use j9+ modules to create 'lean' downloadable apps although j8 remains supported for 'deployment' = webstart for a few more years

            – dave_thompson_085
            Jan 17 at 0:26




            8




            8





            @jerrrrro: apparently you missed the last decade and a half, when Java sandbox (= applet/webstart) bugs were one of the biggest and most frequent vectors for system infections and breaches. Every few weeks all the security websites announced "huge danger from browser java! remove java from all your systems NOW!", a few weeks later "okay, Sun/Oracle patched that one", a few weeks later "ANOTHER huge danger from java!". The browser makers got tired of this and removed support permanently, so Oracle made the best of it: "we didn't really want to run in browsers anymore"

            – dave_thompson_085
            Jan 17 at 0:32





            @jerrrrro: apparently you missed the last decade and a half, when Java sandbox (= applet/webstart) bugs were one of the biggest and most frequent vectors for system infections and breaches. Every few weeks all the security websites announced "huge danger from browser java! remove java from all your systems NOW!", a few weeks later "okay, Sun/Oracle patched that one", a few weeks later "ANOTHER huge danger from java!". The browser makers got tired of this and removed support permanently, so Oracle made the best of it: "we didn't really want to run in browsers anymore"

            – dave_thompson_085
            Jan 17 at 0:32




            4




            4





            @jerrrrro, also, Java applets (and Flash applets) were obsoleted by HTML5 and various WebApis, which allows actual integration into the page as a whole rather than just an embedded box with basically no legal interaction with the rest of the content.

            – Jan Hudec
            Jan 17 at 7:06





            @jerrrrro, also, Java applets (and Flash applets) were obsoleted by HTML5 and various WebApis, which allows actual integration into the page as a whole rather than just an embedded box with basically no legal interaction with the rest of the content.

            – Jan Hudec
            Jan 17 at 7:06













            4














            If you already have the files on your machine, you can try the appletviewer that (used to? still does?) ships with the JDK (Java Development Kit).






            share|improve this answer



























              4














              If you already have the files on your machine, you can try the appletviewer that (used to? still does?) ships with the JDK (Java Development Kit).






              share|improve this answer

























                4












                4








                4







                If you already have the files on your machine, you can try the appletviewer that (used to? still does?) ships with the JDK (Java Development Kit).






                share|improve this answer













                If you already have the files on your machine, you can try the appletviewer that (used to? still does?) ships with the JDK (Java Development Kit).







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Jan 16 at 17:06









                Pete KirkhamPete Kirkham

                22116




                22116












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