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Why do I need Java?

In order to access the simulation tools, you must have Java version 1.4 or later installed on your machine and enabled in your web browser. Note that Java is not the same as Javascript. Visit the Java website to verify which version of Java is installed on your browser. You can also upgrade to the latest release of Java. If you do not have access to install plug-ins, please contact your system administrator about installing or upgrading your Java.

Known Issues

  • KDE Konqueror
    To enable Java in the KDE Konqueror browser, make sure that the Java preferences are enabled and that Use KIO is checked. In the box that specifies the path to the java executable, simply typing java often works better than the full path to the executable.

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Debug Console

Close6 MBRequestSessionTimelineDatabase38Events22
$_GET
Array( ) Array(

)
$_POST
Array( ) Array(

)
$_COOKIE
Array( ) Array(

)
$_SERVER
Array( REDIRECT_SCRIPT_URL => /kb/misc/java, REDIRECT_SCRIPT_URI => https://ielab.info/kb/mis... Array(
REDIRECT_SCRIPT_URL => /kb/misc/java,
REDIRECT_SCRIPT_URI => https://ielab.info/kb/misc/java,
REDIRECT_HTTPS => on,
REDIRECT_SSL_TLS_SNI => ielab.info,
REDIRECT_STATUS => 200,
SCRIPT_URL => /kb/misc/java,
SCRIPT_URI => https://ielab.info/kb/misc/java,
HTTPS => on,
SSL_TLS_SNI => ielab.info,
HTTP_USER_AGENT => CCBot/2.0 (https://commoncrawl.org/faq/),
HTTP_ACCEPT => text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8,
HTTP_ACCEPT_LANGUAGE => en-US,en;q=0.5,
HTTP_IF_MODIFIED_SINCE => Mon, 08 Aug 2022 07:15:49 GMT,
HTTP_ACCEPT_ENCODING => br,gzip,
HTTP_HOST => ielab.info,
HTTP_CONNECTION => Keep-Alive,
PATH => /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin,
SERVER_SIGNATURE => ,
SERVER_SOFTWARE => Apache/2.4.10 (Debian),
SERVER_NAME => ielab.info,
SERVER_ADDR => 149.171.189.2,
SERVER_PORT => 443,
REMOTE_ADDR => 44.200.112.172,
DOCUMENT_ROOT => /var/www/example,
REQUEST_SCHEME => https,
CONTEXT_PREFIX => ,
CONTEXT_DOCUMENT_ROOT => /var/www/example,
SERVER_ADMIN => [no address given],
SCRIPT_FILENAME => /var/www/example/index.php,
REMOTE_PORT => 43742,
REDIRECT_URL => /kb/misc/java,
GATEWAY_INTERFACE => CGI/1.1,
SERVER_PROTOCOL => HTTP/1.1,
REQUEST_METHOD => GET,
QUERY_STRING => ,
REQUEST_URI => /kb/misc/java,
SCRIPT_NAME => /index.php,
PHP_SELF => /index.php,
REQUEST_TIME_FLOAT => 1686275463.407,
REQUEST_TIME => 1686275463
)
separator .
orderBy id
orderDir asc
1 registerIP
2 access
always
renew
tracker.sid 5cdf501caae7603ef4751fe1f9f570d5
tracker.ssid 5cdf501caae7603ef4751fe1f9f570d5
tracker.rsid 5cdf501caae7603ef4751fe1f9f570d5
session.token 1a2e458551bb7fe076b50d75ef00d8f2
  • site 0.015 seconds (+0.015); 3.50 MB (+3.500) - afterInitialise
  • site 0.029 seconds (+0.014); 5.00 MB (+1.500) - afterRoute
  • site 0.044 seconds (+0.014); 6.00 MB (+1.000) - afterDispatch
  • site 0.050 seconds (+0.007); 6.00 MB (0.000) - beforeRenderModule mod_custom (Hub Footer)
  • site 0.051 seconds (+0.001); 6.00 MB (0.000) - afterRenderModule mod_custom (Hub Footer)
  • site 0.051 seconds (+0.000); 6.00 MB (0.000) - beforeRenderModule mod_collect (Collect)
  • site 0.052 seconds (+0.001); 6.00 MB (0.000) - afterRenderModule mod_collect (Collect)
  • site 0.052 seconds (+0.000); 6.00 MB (0.000) - beforeRenderModule mod_menu (Community)
  • site 0.053 seconds (+0.001); 6.00 MB (0.000) - afterRenderModule mod_menu (Community)
  • site 0.053 seconds (+0.000); 6.00 MB (0.000) - beforeRenderModule mod_menu (Support)
  • site 0.053 seconds (+0.000); 6.00 MB (0.000) - afterRenderModule mod_menu (Support)
  • site 0.053 seconds (+0.000); 6.00 MB (0.000) - beforeRenderModule mod_menu (Analyse)
  • site 0.054 seconds (+0.000); 6.00 MB (0.000) - afterRenderModule mod_menu (Analyse)
  • site 0.054 seconds (+0.000); 6.00 MB (0.000) - beforeRenderModule mod_breadcrumbs (Breadcrumbs)
  • site 0.056 seconds (+0.002); 6.25 MB (+0.250) - afterRenderModule mod_breadcrumbs (Breadcrumbs)
  • site 0.056 seconds (+0.000); 6.25 MB (0.000) - beforeRenderModule mod_menu (Main Menu)
  • site 0.069 seconds (+0.014); 6.25 MB (0.000) - afterRenderModule mod_menu (Main Menu)
  • site 0.069 seconds (+0.000); 6.25 MB (0.000) - beforeRenderModule mod_search (Search)
  • site 0.070 seconds (+0.001); 6.25 MB (0.000) - afterRenderModule mod_search (Search)
  • site 0.070 seconds (+0.000); 6.25 MB (0.000) - beforeRenderModule mod_reportproblems (Trouble Report)
  • site 0.074 seconds (+0.004); 6.50 MB (+0.250) - afterRenderModule mod_reportproblems (Trouble Report)
  • site 0.076 seconds (+0.002); 6.50 MB (0.000) - onAfterRender
  • site 0.078 seconds (+0.001); 6.50 MB (0.000) - sessionStore
6 MB

38 Queries Logged: 0.0047791004180908 seconds

  1. SELECT data
      FROM `jos_session`
      WHERE `session_id` = '0935c82dc86b55825aaef397279dfc11'
  2. DELETE
      FROM`jos_session`
      WHERE `session_id` = '0935c82dc86b55825aaef397279dfc11'
  3. SELECT data
      FROM `jos_session`
      WHERE `session_id` = '5cdf501caae7603ef4751fe1f9f570d5'
  4. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_languages'
  5. SELECT session_id
      FROM `jos_session`
      WHERE `session_id` = '5cdf501caae7603ef4751fe1f9f570d5'
      LIMIT 1
  6. INSERT INTO `jos_session` (`session_id`,`client_id`,`time`,`ip`)
      VALUES ('5cdf501caae7603ef4751fe1f9f570d5','0','1686275463','44.200.112.172')
  7. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_members'
  8. SELECT b.id
      FROM `jos_usergroups` AS `a`
      LEFT JOIN jos_usergroups AS b
      ON b.lft <= a.lft
      AND b.rgt >= a.rgt
      WHERE `a`.`id` = '1'
  9. SELECT *
      FROM `jos_viewlevels`
  10. SELECT folder AS type,element AS name,protected,params
      FROM `jos_extensions`
      WHERE `enabled` >= '1'
      AND `type` = 'plugin'
      AND `state` >= '0'
      AND `access` IN ('1','1','4')
      ORDER BY `ordering` ASC
  11. SELECT m.id,m.menutype,m.title,m.alias,m.note,m.path AS route,m.link,m.type,m.level,m.language,m.browserNav,m.access,m.params,m.home,m.img,m.template_style_id,m.component_id,m.parent_id,e.element AS component
      FROM `jos_menu` AS `m`
      LEFT JOIN jos_extensions AS e
      ON e.extension_id = m.component_id
      WHERE `m`.`published` = '1'
      AND `m`.`parent_id` > '0'
      AND `m`.`client_id` = '0'
      ORDER BY `m`.`lft` ASC
  12. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_kb'
  13. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_tags'
  14. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_categories'
  15. SELECT *
      FROM `jos_categories`
      WHERE `jos_categories`.`extension` = 'com_kb'
      AND `jos_categories`.`alias` = 'misc'
  16. SELECT jos_template_styles.id,jos_template_styles.home,jos_template_styles.template,jos_template_styles.params,jos_extensions.protected
      FROM `jos_template_styles`
      INNER JOIN jos_extensions
      ON jos_extensions.element = jos_template_styles.template
      WHERE `jos_template_styles`.`client_id` = '0'
      AND `jos_extensions`.`enabled` = '1'
      AND `jos_extensions`.`type` = 'template'
      AND jos_extensions.`client_id` = `jos_template_styles`.`client_id`
      ORDER BY `home` DESC
  17. SELECT *
      FROM `jos_kb_articles`
      WHERE `jos_kb_articles`.`alias` = 'java'
      AND `jos_kb_articles`.`category` = '20'
  18. SELECT *
      FROM `jos_categories`
      WHERE `jos_categories`.`id` = '20'
  19. SELECT jos_tags_object.label,jos_tags.*
      FROM `jos_tags`
      INNER JOIN jos_tags_object
      ON jos_tags_object.tagid = jos_tags.id
      WHERE `jos_tags_object`.`tbl` = 'kb'
      AND `jos_tags_object`.`objectid` = '13'
      AND `jos_tags`.`admin` = '0'
      GROUP BY jos_tags.id
  20. SELECT category,count(*) AS articles
      FROM `jos_kb_articles`
      WHERE `jos_kb_articles`.`state` = '1'
      AND `jos_kb_articles`.`access` IN ('1','1','4')
      GROUP BY category
  21. SELECT *
      FROM `jos_categories`
      WHERE `jos_categories`.`extension` = 'com_kb'
      AND `jos_categories`.`published` = '1'
      AND `jos_categories`.`access` IN ('1','1','4')
      AND `jos_categories`.`parent_id` = '1'
      ORDER BY `title` ASC
  22. SELECT *
      FROM `jos_categories`
      WHERE `jos_categories`.`parent_id` = '20'
  23. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_search'
  24. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_users'
  25. SELECT m.id,m.title,m.module,m.position,m.content,m.showtitle,m.params,mm.menuid,e.protected
      FROM `jos_modules` AS `m`
      LEFT JOIN jos_modules_menu AS mm
      ON mm.moduleid = m.id
      LEFT JOIN jos_extensions AS e
      ON e.element = m.module
      AND e.client_id = m.client_id
      WHERE `m`.`published` = '1'
      AND `e`.`enabled` = '1'
      AND (`m`.`publish_up` = '0000-00-00 00:00:00' OR `m`.`publish_up` <= '2023-06-09 01:51:03' )
      AND (`m`.`publish_down` = '0000-00-00 00:00:00' OR `m`.`publish_down` >= '2023-06-09 01:51:03' )
      AND `m`.`access` IN ('1','1','4')
      AND `m`.`client_id` = '0'
      AND (`mm`.`menuid` = '82' OR `mm`.`menuid` <= '0' )
      ORDER BY `m`.`position` ASC,`m`.`ordering` ASC
  26. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_support'
  27. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_content'
  28. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_newsletter'
  29. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_groups'
  30. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_projects'
  31. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_answers'
  32. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_collections'
  33. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_blog'
  34. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_resources'
  35. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_wiki'
  36. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_citations'
  37. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_wishlist'
  38. UPDATE `jos_session`
      SET `data` = '__default|a:10:{s:15:\"session.counter\";i:1;s:19:\"session.timer.start\";i:1686275463;s:18:\"session.timer.last\";i:1686275463;s:17:\"session.timer.now\";i:1686275463;s:8:\"registry\";O:23:\"Hubzero\\Config\\Registry\":2:{s:7:\"\0*\0data\";O:8:\"stdClass\":1:{s:1:\"0\";s:7:\"session\";}s:9:\"separator\";s:1:\".\";}s:4:\"user\";C:17:\"Hubzero\\User\\User\":22:{a:1:{s:5:\"guest\";b:1;}}s:11:\"tracker.sid\";s:32:\"5cdf501caae7603ef4751fe1f9f570d5\";s:12:\"tracker.ssid\";s:32:\"5cdf501caae7603ef4751fe1f9f570d5\";s:12:\"tracker.rsid\";s:32:\"5cdf501caae7603ef4751fe1f9f570d5\";s:13:\"session.token\";s:32:\"1a2e458551bb7fe076b50d75ef00d8f2\";}',`time` = '1686275463',`ip` = '44.200.112.172'
      WHERE `session_id` = '5cdf501caae7603ef4751fe1f9f570d5'
  • onAfterInitialise Method plgSystemP3p::onAfterInitialise /core/plugins/system/p3p/p3p.php:45
  • onAfterInitialise Method plgSystemRemember::onAfterInitialise /core/plugins/system/remember/remember.php:44
  • onAfterInitialise Method plgSystemHubzero::onAfterInitialise /core/plugins/system/hubzero/hubzero.php:46
  • onAfterInitialise Method plgSystemXFeed::onAfterInitialise /core/plugins/system/xfeed/xfeed.php:46
  • onAfterInitialise Method plgSystemSupergroup::onAfterInitialise /core/plugins/system/supergroup/supergroup.php:138
  • onAfterRoute Method plgSystemJquery::onAfterRoute /core/plugins/system/jquery/jquery.php:46
  • onAfterRoute Method plgSystemSpamjail::onAfterRoute /core/plugins/system/spamjail/spamjail.php:46
  • onAfterRoute Method plgSystemIncomplete::onAfterRoute /core/plugins/system/incomplete/incomplete.php:46
  • onAfterRoute Method plgSystemUnconfirmed::onAfterRoute /core/plugins/system/unconfirmed/unconfirmed.php:46
  • onAfterRoute Method plgSystemUnapproved::onAfterRoute /core/plugins/system/unapproved/unapproved.php:46
  • onAfterRoute Method plgSystemPassword::onAfterRoute /core/plugins/system/password/password.php:46
  • onContentPrepare Method plgContentLoadmodule::onContentPrepare /core/plugins/content/loadmodule/loadmodule.php:60
  • onContentPrepare Method plgContentEmailcloak::onContentPrepare /core/plugins/content/emailcloak/emailcloak.php:49
  • onContentPrepare Method plgContentPagebreak::onContentPrepare /core/plugins/content/pagebreak/pagebreak.php:59
  • onContentPrepare Method plgContentXhubtags::onContentPrepare /core/plugins/content/xhubtags/xhubtags.php:50
  • onContentPrepare Method plgContentFormatwiki::onContentPrepare /core/plugins/content/formatwiki/formatwiki.php:88
  • onContentPrepare Method plgContentFormathtml::onContentPrepare /core/plugins/content/formathtml/formathtml.php:130
  • onAfterDispatch Method plgSystemMobile::onAfterDispatch /core/plugins/system/mobile/mobile.php:47
  • onAfterDispatch Method plgSystemDebug::onAfterDispatch /core/plugins/system/debug/debug.php:87
  • onAfterDispatch Method PlgSystemHighlight::onAfterDispatch /core/plugins/system/highlight/highlight.php:49
  • onDisplay Method plgCaptchaImage::onDisplay /core/plugins/captcha/image/image.php:80
  • onAfterRender Method plgSystemSef::onAfterRender /core/plugins/system/sef/sef.php:45