Index: install/prerequisites.php
===================================================================
--- install/prerequisites.php	(revision 14860)
+++ install/prerequisites.php	(working copy)
@@ -121,6 +121,8 @@
 
 			$ret['mysql'] = function_exists('mysql_connect');
 			$ret['json'] = function_exists('json_encode');
+			exec('java -version 2>&1', $output);
+			$ret['java'] = (stripos($output[0], 'java version') !== false);
 
 			$ret['memory_limit'] = $this->isPhpSettingChangeable('memory_limit', '33M');
 			$ret['date.timezone'] = ini_get('date.timezone') != '';
Index: install/step_templates/sys_requirements.tpl
===================================================================
--- install/step_templates/sys_requirements.tpl	(revision 14860)
+++ install/step_templates/sys_requirements.tpl	(working copy)
@@ -21,6 +21,7 @@
 		'jpeg' => '- jpeg (required)',
 		'mysql' => '- MySQL (required)',
 		'json' => '- JSON (optional)',
+		'java' => '- Java (optional)',
 		'sep2' => '<strong>PHP settings:</strong>',
 		'memory_limit' => "- ini_set('memory_limit', ...) works (optional)",
 		'date.timezone' => "- ini_get('date.timezone') - timezone set (required)",