logic: add auto-detection for JRE System Library

* fixed error columns are not saved to database correctly
* implemented setting JRE System Library paths in app settings
* added detector for JRE System Library that not use Java Runtime specified in AppSettings but detects JRE on its own by reusing the JavaPathDetector.
* added option to use JRE System Library in JavaSourceGroup

bin/app/user/projects/javaparser/javaparser.srctrlprj

@@ -25,6 +25,7 @@
                 <source_path>./src/main/java</source_path>
                 <source_path>./target/generated-sources/javacc</source_path>
             </source_paths>
+            <use_jre_system_library>1</use_jre_system_library>
             <standard>8</standard>
         </source_group_7a9e75fc-2cad-42d5-8c5b-c86d02f7b4e4>
     </source_groups>

src/lib/data/SqliteIndexStorage.cpp

@@ -265,7 +265,7 @@ Id SqliteIndexStorage::addError(const std::string& message, const FilePath& file
 		m_insertErrorStmt.bind(3, indexed);
 		m_insertErrorStmt.bind(4, filePath.str().c_str());
 		m_insertErrorStmt.bind(5, int(lineNumber));
-		m_insertErrorStmt.bind(5, int(columnNumber));
+		m_insertErrorStmt.bind(6, int(columnNumber));
 		const bool success = executeStatement(m_insertErrorStmt);
 		m_insertErrorStmt.reset();
 

src/lib/settings/ApplicationSettings.cpp

@@ -276,6 +276,21 @@ void ApplicationSettings::setJavaMaximumMemory(int size)
 	setValue<int>("indexing/java/java_maximum_memory", size);
 }
 
+std::vector<FilePath> ApplicationSettings::getJreSystemLibraryPaths() const
+{
+	return getPathValues("indexing/java/jre_system_library_paths/jre_system_library_path");
+}
+
+std::vector<FilePath> ApplicationSettings::getJreSystemLibraryPathsExpanded() const
+{
+	return expandPaths(getJreSystemLibraryPaths());
+}
+
+bool ApplicationSettings::setJreSystemLibraryPaths(const std::vector<FilePath>& jreSystemLibraryPaths)
+{
+	return setPathValues("indexing/java/jre_system_library_paths/jre_system_library_path", jreSystemLibraryPaths);
+}
+
 FilePath ApplicationSettings::getMavenPath() const
 {
 	return FilePath(getValue<std::string>("indexing/java/maven_path", ""));

src/lib/settings/ApplicationSettings.h

@@ -82,6 +82,10 @@ public:
 	int getJavaMaximumMemory() const;
 	void setJavaMaximumMemory(int size);
 
+	std::vector<FilePath> getJreSystemLibraryPaths() const;
+	std::vector<FilePath> getJreSystemLibraryPathsExpanded() const;
+	bool setJreSystemLibraryPaths(const std::vector<FilePath>& jreSystemLibraryPaths);
+
 	FilePath getMavenPath() const;
 	void setMavenPath(const FilePath& path);
 

src/lib/settings/ProjectSettings.cpp

@@ -163,7 +163,8 @@ std::vector<std::shared_ptr<SourceGroupSettings>> ProjectSettings::getAllSourceG
 		case SOURCE_GROUP_JAVA_MAVEN:
 			{
 				std::shared_ptr<SourceGroupSettingsJava> javaSettings = std::make_shared<SourceGroupSettingsJava>(id, type, this);
-				javaSettings->setClasspaths(getPathValues(key + "/class_paths/class_path"));
+				javaSettings->setClasspath(getPathValues(key + "/class_paths/class_path"));
+				javaSettings->setUseJreSystemLibrary(getValue<bool>(key + "/use_jre_system_library", true));
 				if (type == SOURCE_GROUP_JAVA_MAVEN)
 				{
 					javaSettings->setMavenProjectFilePath(FilePath(getValue<std::string>(key + "/maven/project_file_path", "")));
@@ -237,7 +238,8 @@ void ProjectSettings::setAllSourceGroupSettings(const std::vector<std::shared_pt
 		case SOURCE_GROUP_JAVA_MAVEN:
 			if (std::shared_ptr<SourceGroupSettingsJava> javaSettings = std::dynamic_pointer_cast<SourceGroupSettingsJava>(settings))
 			{
-				setPathValues(key + "/class_paths/class_path", javaSettings->getClasspaths());
+				setPathValues(key + "/class_paths/class_path", javaSettings->getClasspath());
+				setValue(key + "/use_jre_system_library", javaSettings->getUseJreSystemLibrary());
 
 				if (type == SOURCE_GROUP_JAVA_MAVEN)
 				{

src/lib/settings/SourceGroupSettingsJava.cpp

@@ -4,7 +4,7 @@
 
 SourceGroupSettingsJava::SourceGroupSettingsJava(const std::string& id, SourceGroupType type, const ProjectSettings* projectSettings)
 	: SourceGroupSettings(id, type, projectSettings)
-	, m_classpaths(std::vector<FilePath>())
+	, m_classpath(std::vector<FilePath>())
 	, m_mavenProjectFilePath(FilePath())
 	, m_mavenDependenciesDirectory(FilePath())
 	, m_shouldIndexMavenTests(false)
@@ -22,7 +22,8 @@ bool SourceGroupSettingsJava::equals(std::shared_ptr<SourceGroupSettings> other)
 	return (
 		otherJava &&
 		SourceGroupSettings::equals(other) &&
-		utility::isPermutation(m_classpaths, otherJava->m_classpaths) &&
+		utility::isPermutation(m_classpath, otherJava->m_classpath) &&
+		m_useJreSystemLibrary == otherJava->m_useJreSystemLibrary &&
 		m_mavenProjectFilePath == otherJava->m_mavenProjectFilePath &&
 		m_mavenDependenciesDirectory == otherJava->m_mavenDependenciesDirectory &&
 		m_shouldIndexMavenTests == otherJava->m_shouldIndexMavenTests
@@ -34,19 +35,29 @@ std::vector<std::string> SourceGroupSettingsJava::getAvailableLanguageStandards(
 	return std::vector<std::string>(1, "8");
 }
 
-std::vector<FilePath> SourceGroupSettingsJava::getClasspaths() const
+bool SourceGroupSettingsJava::getUseJreSystemLibrary() const
 {
-	return m_classpaths;
+	return m_useJreSystemLibrary;
 }
 
-std::vector<FilePath> SourceGroupSettingsJava::getClasspathsExpandedAndAbsolute() const
+void SourceGroupSettingsJava::setUseJreSystemLibrary(bool useJreSystemLibrary)
 {
-	return m_projectSettings->makePathsExpandedAndAbsolute(getClasspaths());
+	m_useJreSystemLibrary = useJreSystemLibrary;
 }
 
-void SourceGroupSettingsJava::setClasspaths(const std::vector<FilePath>& classpaths)
+std::vector<FilePath> SourceGroupSettingsJava::getClasspath() const
 {
-	m_classpaths = classpaths;
+	return m_classpath;
+}
+
+std::vector<FilePath> SourceGroupSettingsJava::getClasspathExpandedAndAbsolute() const
+{
+	return m_projectSettings->makePathsExpandedAndAbsolute(getClasspath());
+}
+
+void SourceGroupSettingsJava::setClasspath(const std::vector<FilePath>& classpath)
+{
+	m_classpath = classpath;
 }
 
 FilePath SourceGroupSettingsJava::getMavenProjectFilePath() const

src/lib/settings/SourceGroupSettingsJava.h

@@ -17,9 +17,12 @@ public:
 
 	virtual std::vector<std::string> getAvailableLanguageStandards() const;
 
-	std::vector<FilePath> getClasspaths() const;
-	std::vector<FilePath> getClasspathsExpandedAndAbsolute() const;
-	void setClasspaths(const std::vector<FilePath>& classpaths);
+	bool getUseJreSystemLibrary() const;
+	void setUseJreSystemLibrary(bool useJreSystemLibrary);
+
+	std::vector<FilePath> getClasspath() const;
+	std::vector<FilePath> getClasspathExpandedAndAbsolute() const;
+	void setClasspath(const std::vector<FilePath>& classpath);
 
 	FilePath getMavenProjectFilePath() const;
 	FilePath getMavenProjectFilePathExpandedAndAbsolute() const;
@@ -36,7 +39,8 @@ private:
 	virtual std::vector<std::string> getDefaultSourceExtensions() const;
 	virtual std::string getDefaultStandard() const;
 
-	std::vector<FilePath> m_classpaths;
+	bool m_useJreSystemLibrary;
+	std::vector<FilePath> m_classpath;
 	FilePath m_mavenProjectFilePath;
 	FilePath m_mavenDependenciesDirectory;
 	bool m_shouldIndexMavenTests;

src/lib_gui/CMakeLists.txt

@@ -239,6 +239,15 @@ add_files(
 	utility/path_detector/java_runtime/JavaPathDetectorWindows.cpp
 	utility/path_detector/java_runtime/JavaPathDetectorWindows.h
 
+	utility/path_detector/jre_system_library/JreSystemLibraryPathDetector.cpp
+	utility/path_detector/jre_system_library/JreSystemLibraryPathDetector.h
+	utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorLinux.cpp
+	utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorLinux.h
+	utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorMac.cpp
+	utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorMac.h
+	utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorWindows.cpp
+	utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorWindows.h
+
 	utility/path_detector/maven_executable/MavenPathDetectorUnix.cpp
 	utility/path_detector/maven_executable/MavenPathDetectorUnix.h
 	utility/path_detector/maven_executable/MavenPathDetectorWindows.cpp

src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentPaths.cpp

@@ -1,9 +1,10 @@
 #include "qt/window/project_wizzard/QtProjectWizzardContentPaths.h"
 
+#include <QCheckBox>
+#include <QComboBox>
 #include <QLabel>
 #include <QMessageBox>
 #include <QVBoxLayout>
-#include <QComboBox>
 
 #include "qt/element/QtDirectoryListBox.h"
 #include "qt/window/QtSelectPathsDialog.h"
@@ -221,7 +222,7 @@ QtProjectWizzardContentPathsCDBHeader::QtProjectWizzardContentPathsCDBHeader(
 	);
 }
 
-void QtProjectWizzardContentPathsCDBHeader::populate( QGridLayout* layout, int& row)
+void QtProjectWizzardContentPathsCDBHeader::populate(QGridLayout* layout, int& row)
 {
 	QtProjectWizzardContentPaths::populate(layout, row);
 
@@ -479,12 +480,26 @@ QtProjectWizzardContentPathsClassJava::QtProjectWizzardContentPathsClassJava(
 	);
 }
 
+void QtProjectWizzardContentPathsClassJava::populate(QGridLayout* layout, int& row)
+{
+	QtProjectWizzardContentPaths::populate(layout, row);
+
+	QLabel* label = createFormLabel("JRE System Library");
+	layout->addWidget(label, row, QtProjectWizzardWindow::FRONT_COL, Qt::AlignTop);
+
+	m_useJreSystemLibraryCheckBox = new QCheckBox("Use JRE System Library", this);
+
+	layout->addWidget(m_useJreSystemLibraryCheckBox, row, QtProjectWizzardWindow::BACK_COL);
+	row++;
+}
+
 void QtProjectWizzardContentPathsClassJava::load()
 {
 	std::shared_ptr<SourceGroupSettingsJava> javaSettings = std::dynamic_pointer_cast<SourceGroupSettingsJava>(m_settings);
 	if (javaSettings)
 	{
-		m_list->setList(javaSettings->getClasspaths());
+		m_list->setList(javaSettings->getClasspath());
+		m_useJreSystemLibraryCheckBox->setChecked(javaSettings->getUseJreSystemLibrary());
 	}
 }
 
@@ -493,6 +508,7 @@ void QtProjectWizzardContentPathsClassJava::save()
 	std::shared_ptr<SourceGroupSettingsJava> javaSettings = std::dynamic_pointer_cast<SourceGroupSettingsJava>(m_settings);
 	if (javaSettings)
 	{
-		javaSettings->setClasspaths(m_list->getList());
+		javaSettings->setClasspath(m_list->getList());
+		javaSettings->setUseJreSystemLibrary(m_useJreSystemLibraryCheckBox->isChecked());
 	}
 }

src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentPaths.h

@@ -4,9 +4,10 @@
 #include "qt/window/project_wizzard/QtProjectWizzardContent.h"
 #include "utility/path_detector/CombinedPathDetector.h"
 
-class QtDirectoryListBox;
-class QPushButton;
+class QCheckBox;
 class QComboBox;
+class QPushButton;
+class QtDirectoryListBox;
 class SourceGroupSettings;
 
 class QtProjectWizzardContentPaths
@@ -153,8 +154,12 @@ public:
 	QtProjectWizzardContentPathsClassJava(std::shared_ptr<SourceGroupSettings> settings, QtProjectWizzardWindow* window);
 
 	// QtProjectWizzardContent implementation
+	virtual void populate(QGridLayout* layout, int& row);
 	virtual void load() override;
 	virtual void save() override;
+
+private:
+	QCheckBox* m_useJreSystemLibraryCheckBox;
 };
 
 #endif // QT_PROJECT_WIZZARD_CONTENT_PATHS_H

src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentPreferences.cpp

@@ -155,90 +155,112 @@ void QtProjectWizzardContentPreferences::populate(QGridLayout* layout, int& row)
 	// Java
 	addTitle("JAVA", layout, row);
 
-	// jvm library path
-	m_javaPath = new QtLocationPicker(this);
-
-	if (QSysInfo::windowsVersion() != QSysInfo::WV_None)
 	{
-		m_javaPath->setFileFilter("JVM Library (jvm.dll)");
-		m_javaPath->setPlaceholderText("<jre_path>/bin/client/jvm.dll");
+		// jvm library path
+		m_javaPath = new QtLocationPicker(this);
+
+		if (QSysInfo::windowsVersion() != QSysInfo::WV_None)
+		{
+			m_javaPath->setFileFilter("JVM Library (jvm.dll)");
+			m_javaPath->setPlaceholderText("<jre_path>/bin/client/jvm.dll");
+		}
+		else if (QSysInfo::macVersion() != QSysInfo::MV_None)
+		{
+			m_javaPath->setFileFilter("JLI or JVM Library (libjli.dylib libjvm.dylib)");
+			m_javaPath->setPlaceholderText("<jre_path>/Contents/Home/jre/lib/jli/libjli.dylib");
+		}
+		else
+		{
+			m_javaPath->setFileFilter("JVM Library (libjvm.so)");
+			m_javaPath->setPlaceholderText("<jre_path>/bin/<arch>/server/libjvm.so");
+		}
+
+		addLabelAndWidget("Java Path", m_javaPath, layout, row);
+
+		std::string javaVersionString = "";
+		switch (utility::getApplicationArchitectureType())
+		{
+		case APPLICATION_ARCHITECTURE_X86_32:
+			javaVersionString = "32 Bit ";
+			break;
+		case APPLICATION_ARCHITECTURE_X86_64:
+			javaVersionString = "64 Bit ";
+			break;
+		default:
+			break;
+		}
+		javaVersionString += "Java 8";
+
+		addHelpButton((
+			"<p>Only required for indexing Java projects.</p>"
+			"<p>Provide the location of the jvm library inside the installation of your " + javaVersionString +
+			" runtime environment (for information on how to set this take a look at "
+			"<a href=\"https://sourcetrail.com/documentation/#FindingJavaRuntimeLibraryLocation\">"
+			"Finding Java Runtime Library Location</a> or use the auto detection below)</p>").c_str(),
+			layout, row
+		);
+		row++;
+
+		m_javaPathDetector = utility::getJavaRuntimePathDetector();
+		addJavaPathDetection(layout, row);
 	}
-	else if (QSysInfo::macVersion() != QSysInfo::MV_None)
 	{
-		m_javaPath->setFileFilter("JLI or JVM Library (libjli.dylib libjvm.dylib)");
-		m_javaPath->setPlaceholderText("<jre_path>/Contents/Home/jre/lib/jli/libjli.dylib");
+		// jvm max memory
+		m_jvmMaximumMemory = addLineEdit(
+			"JVM Maximum Memory",
+			"<p>Specify the maximum amount of memory that will be allocated by the indexer's JVM (values are in MB). Set "
+			"this value to -1 to use the JVM's default setting.</p>"
+			"<p><b>Warning</b>: You may experience a sudden slowdown during the course of indexing when setting this value "
+			"too low. This may also happen when using the JVM's default setting.</p>",
+			layout, row
+		);
+		layout->setRowMinimumHeight(row - 1, 30);
 	}
-	else
 	{
-		m_javaPath->setFileFilter("JVM Library (libjvm.so)");
-		m_javaPath->setPlaceholderText("<jre_path>/bin/<arch>/server/libjvm.so");
+		// JRE System Library
+		const QString title = "JRE System Library";
+		QLabel* label = createFormLabel(title);
+		layout->addWidget(label, row, QtProjectWizzardWindow::FRONT_COL, Qt::AlignTop);
+
+		addHelpButton(
+			"<p>Only required for indexing Java projects.</p>"
+			"<p>Add the jar files of your JRE System Library. These jars can be found inside your JRE install directory.</p>", layout, row);
+
+		m_jreSystemLibraryPaths = new QtDirectoryListBox(this, title);
+
+		layout->addWidget(m_jreSystemLibraryPaths, row, QtProjectWizzardWindow::BACK_COL);
+		row++;
+
+		m_jreSystemLibraryPathsDetector = utility::getJreSystemLibraryPathsDetector();
+		addJreSystemLibraryPathsDetection(layout, row);
 	}
-
-	addLabelAndWidget("Java Path", m_javaPath, layout, row);
-
-	std::string javaVersionString = "";
-	switch (utility::getApplicationArchitectureType())
 	{
-	case APPLICATION_ARCHITECTURE_X86_32:
-		javaVersionString = "32 Bit ";
-		break;
-	case APPLICATION_ARCHITECTURE_X86_64:
-		javaVersionString = "64 Bit ";
-		break;
-	default:
-		break;
+		// maven path
+		m_mavenPath = new QtLocationPicker(this);
+
+		if (QSysInfo::windowsVersion() != QSysInfo::WV_None)
+		{
+			m_mavenPath->setFileFilter("Maven command (mvn.cmd)");
+			m_mavenPath->setPlaceholderText("<maven_path>/bin/mvn.cmd");
+		}
+		else
+		{
+			m_mavenPath->setFileFilter("Maven command (mvn)");
+			m_mavenPath->setPlaceholderText("<binarypath>/mvn");
+		}
+
+		addLabelAndWidget("Maven Path", m_mavenPath, layout, row);
+
+		addHelpButton(
+			"<p>Only required for indexing projects using Maven.</p>"
+			"<p>Provide the location of your installed Maven executable. You can also use the auto detection below.</p>"
+			, layout, row
+		);
+		row++;
+
+		m_mavenPathDetector = utility::getMavenExecutablePathDetector();
+		addMavenPathDetection(layout, row);
 	}
-	javaVersionString += "Java 8";
-
-	addHelpButton((
-		"<p>Only required for indexing Java projects.</p>"
-		"<p>Provide the location of the jvm library inside the installation of your " + javaVersionString +
-		" runtime environment (for information on how to set this take a look at "
-		"<a href=\"https://sourcetrail.com/documentation/#FindingJavaRuntimeLibraryLocation\">"
-		"Finding Java Runtime Library Location</a> or use the auto detection below)</p>").c_str(),
-		layout, row
-	);
-	row++;
-
-	m_javaPathDetector = utility::getJavaRuntimePathDetector();
-	addJavaPathDetection(layout, row);
-
-	// jvm max memory
-	m_jvmMaximumMemory = addLineEdit(
-		"JVM Maximum Memory",
-		"<p>Specify the maximum amount of memory that will be allocated by the indexer's JVM (values are in MB). Set "
-		"this value to -1 to use the JVM's default setting.</p>"
-		"<p><b>Warning</b>: You may experience a sudden slowdown during the course of indexing when setting this value "
-		"too low. This may also happen when using the JVM's default setting.</p>",
-		layout, row
-	);
-	layout->setRowMinimumHeight(row - 1, 30);
-
-	// maven path
-	m_mavenPath = new QtLocationPicker(this);
-
-	if (QSysInfo::windowsVersion() != QSysInfo::WV_None)
-	{
-		m_mavenPath->setFileFilter("Maven command (mvn.cmd)");
-		m_mavenPath->setPlaceholderText("<maven_path>/bin/mvn.cmd");
-	}
-	else
-	{
-		m_mavenPath->setFileFilter("Maven command (mvn)");
-		m_mavenPath->setPlaceholderText("<binarypath>/mvn");
-	}
-
-	addLabelAndWidget("Maven Path", m_mavenPath, layout, row);
-
-	addHelpButton(
-		"<p>Only required for indexing projects using Maven.</p>"
-		"<p>Provide the location of your installed Maven executable. You can also use the auto detection below.</p>"
-		, layout, row
-	);
-	row++;
-
-	m_mavenPathDetector = utility::getMavenExecutablePathDetector();
-	addMavenPathDetection(layout, row);
 
 	addGap(layout, row);
 
@@ -290,6 +312,8 @@ void QtProjectWizzardContentPreferences::load()
 
 	m_jvmMaximumMemory->setText(QString::number(appSettings->getJavaMaximumMemory()));
 
+	m_jreSystemLibraryPaths->setList(appSettings->getJreSystemLibraryPaths());
+
 	if (m_mavenPath)
 	{
 		m_mavenPath->setText(QString::fromStdString(appSettings->getMavenPath().str()));
@@ -332,6 +356,8 @@ void QtProjectWizzardContentPreferences::save()
 		appSettings->setJavaPath(m_javaPath->getText().toStdString());
 	}
 
+	appSettings->setJreSystemLibraryPaths(m_jreSystemLibraryPaths->getList());
+
 	int jvmMaximumMemory = m_jvmMaximumMemory->text().toInt();
 	if (jvmMaximumMemory) appSettings->setJavaMaximumMemory(jvmMaximumMemory);
 
@@ -363,6 +389,13 @@ void QtProjectWizzardContentPreferences::javaPathDetectionClicked()
 	}
 }
 
+void QtProjectWizzardContentPreferences::jreSystemLibraryPathsDetectionClicked()
+{
+	std::vector<FilePath> paths = m_jreSystemLibraryPathsDetector->getPaths(m_jreSystemLibraryPathsDetectorBox->currentText().toStdString());
+	std::vector<FilePath> oldPaths = m_jreSystemLibraryPaths->getList();
+	m_jreSystemLibraryPaths->setList(utility::unique(utility::concat(oldPaths, paths)));
+}
+
 void QtProjectWizzardContentPreferences::mavenPathDetectionClicked()
 {
 	std::vector<FilePath> paths = m_mavenPathDetector->getPaths(m_mavenPathDetectorBox->currentText().toStdString());
@@ -424,6 +457,40 @@ void QtProjectWizzardContentPreferences::addJavaPathDetection(QGridLayout* layou
 	row++;
 }
 
+void QtProjectWizzardContentPreferences::addJreSystemLibraryPathsDetection(QGridLayout* layout, int& row)
+{
+	const std::vector<std::string> detectorNames = m_jreSystemLibraryPathsDetector->getWorkingDetectorNames();
+	if (detectorNames.empty())
+	{
+		return;
+	}
+
+	QLabel* label = new QLabel("Auto detection from:");
+
+	m_jreSystemLibraryPathsDetectorBox = new QComboBox();
+
+	for (const std::string& detectorName: detectorNames)
+	{
+		m_jreSystemLibraryPathsDetectorBox->addItem(detectorName.c_str());
+	}
+
+	QPushButton* button = new QPushButton("detect");
+	button->setObjectName("windowButton");
+	connect(button, SIGNAL(clicked()), this, SLOT(jreSystemLibraryPathsDetectionClicked()));
+
+	QHBoxLayout* hlayout = new QHBoxLayout();
+	hlayout->setContentsMargins(0, 0, 0, 0);
+	hlayout->addWidget(label);
+	hlayout->addWidget(m_jreSystemLibraryPathsDetectorBox);
+	hlayout->addWidget(button);
+
+	QWidget* detectionWidget = new QWidget();
+	detectionWidget->setLayout(hlayout);
+
+	layout->addWidget(detectionWidget, row, QtProjectWizzardWindow::BACK_COL, Qt::AlignLeft | Qt::AlignTop);
+	row++;
+}
+
 void QtProjectWizzardContentPreferences::addMavenPathDetection(QGridLayout* layout, int& row)
 {
 	std::vector<std::string> detectorNames = m_mavenPathDetector->getWorkingDetectorNames();

src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentPreferences.h

@@ -8,6 +8,7 @@
 
 #include "qt/element/QtFontPicker.h"
 #include "qt/element/QtLocationPicker.h"
+#include "qt/element/QtDirectoryListBox.h"
 #include "qt/window/project_wizzard/QtProjectWizzardContent.h"
 #include "utility/path_detector/CombinedPathDetector.h"
 
@@ -30,12 +31,14 @@ public:
 private slots:
 	void colorSchemeChanged(int index);
 	void javaPathDetectionClicked();
+	void jreSystemLibraryPathsDetectionClicked();
 	void mavenPathDetectionClicked();
 	void loggingEnabledChanged();
 	void indexerThreadsChanges(int index);
 
 private:
 	void addJavaPathDetection(QGridLayout* layout, int& row);
+	void addJreSystemLibraryPathsDetection(QGridLayout* layout, int& row);
 	void addMavenPathDetection(QGridLayout* layout, int& row);
 
 	void addTitle(QString title, QGridLayout* layout, int& row);
@@ -72,13 +75,16 @@ private:
 	QCheckBox* m_multiProcessIndexing;
 
 	std::shared_ptr<CombinedPathDetector> m_javaPathDetector;
+	std::shared_ptr<CombinedPathDetector> m_jreSystemLibraryPathsDetector;
 	std::shared_ptr<CombinedPathDetector> m_mavenPathDetector;
 
 	QComboBox* m_javaPathDetectorBox;
+	QComboBox* m_jreSystemLibraryPathsDetectorBox;
 	QComboBox* m_mavenPathDetectorBox;
 	QtLocationPicker* m_javaPath;
-	QtLocationPicker* m_mavenPath;
+	QtDirectoryListBox* m_jreSystemLibraryPaths;
 	QLineEdit* m_jvmMaximumMemory;
+	QtLocationPicker* m_mavenPath;
 };
 
 #endif // QT_PROJECT_WIZZARD_CONTENT_PREFERENCES_H

src/lib_gui/utility/path_detector/jre_system_library/JreSystemLibraryPathDetector.cpp

@@ -0,0 +1,35 @@
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetector.h"
+
+#include "utility/path_detector/java_runtime/JavaPathDetector.h"
+
+#include "settings/ApplicationSettings.h"
+#include "utility/file/FilePath.h"
+#include "utility/file/FileSystem.h"
+
+JreSystemLibraryPathDetector::JreSystemLibraryPathDetector(std::shared_ptr<JavaPathDetector> javaPathDetector)
+	: PathDetector("JRE System Library")
+	, m_javaPathDetector(javaPathDetector)
+{
+}
+
+JreSystemLibraryPathDetector::~JreSystemLibraryPathDetector()
+{
+}
+
+std::vector<FilePath> JreSystemLibraryPathDetector::getPaths() const
+{
+	std::vector<FilePath> paths;
+	for (const FilePath& jrePath: m_javaPathDetector->getPaths())
+	{
+		const FilePath javaRoot = jrePath.parentDirectory().parentDirectory().parentDirectory();
+		for (const FilePath& jarPath : FileSystem::getFilePathsFromDirectory(javaRoot.concat(FilePath("lib")), {".jar"}))
+		{
+			paths.push_back(jarPath);
+		}
+		if (!paths.empty())
+		{
+			break;
+		}
+	}
+	return paths;
+}

src/lib_gui/utility/path_detector/jre_system_library/JreSystemLibraryPathDetector.h

@@ -0,0 +1,22 @@
+#ifndef JRE_SYSTEM_LIBRARY_PATH_DETECTOR_H
+#define JRE_SYSTEM_LIBRARY_PATH_DETECTOR_H
+
+#include <memory>
+
+#include "utility/path_detector/PathDetector.h"
+
+class JavaPathDetector;
+
+class JreSystemLibraryPathDetector: public PathDetector
+{
+public:
+	JreSystemLibraryPathDetector(std::shared_ptr<JavaPathDetector> javaPathDetector);
+	virtual ~JreSystemLibraryPathDetector();
+
+	virtual std::vector<FilePath> getPaths() const;
+
+private:
+	std::shared_ptr<JavaPathDetector> m_javaPathDetector;
+};
+
+#endif // JRE_SYSTEM_LIBRARY_PATH_DETECTOR_H

src/lib_gui/utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorLinux.cpp

@@ -0,0 +1,12 @@
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorLinux.h"
+
+#include "utility/path_detector/java_runtime/JavaPathDetectorLinux.h"
+
+JreSystemLibraryPathDetectorLinux::JreSystemLibraryPathDetectorLinux(const std::string javaVersion)
+	: JreSystemLibraryPathDetector(std::make_shared<JavaPathDetectorLinux>(javaVersion))
+{
+}
+
+JreSystemLibraryPathDetectorLinux::~JreSystemLibraryPathDetectorLinux()
+{
+}

src/lib_gui/utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorLinux.h

@@ -0,0 +1,13 @@
+#ifndef JRE_SYSTEM_LIBRARY_PATH_DETECTOR_LINUX_H
+#define JRE_SYSTEM_LIBRARY_PATH_DETECTOR_LINUX_H
+
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetector.h"
+
+class JreSystemLibraryPathDetectorLinux: public JreSystemLibraryPathDetector
+{
+public:
+	JreSystemLibraryPathDetectorLinux(const std::string javaVersion);
+	virtual ~JreSystemLibraryPathDetectorLinux();
+};
+
+#endif // JRE_SYSTEM_LIBRARY_PATH_DETECTOR_LINUX_H

src/lib_gui/utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorMac.cpp

@@ -0,0 +1,12 @@
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorMac.h"
+
+#include "utility/path_detector/java_runtime/JavaPathDetectorMac.h"
+
+JreSystemLibraryPathDetectorMac::JreSystemLibraryPathDetectorMac(const std::string javaVersion)
+	: JreSystemLibraryPathDetector(std::make_shared<JavaPathDetectorMac>(javaVersion))
+{
+}
+
+JreSystemLibraryPathDetectorMac::~JreSystemLibraryPathDetectorMac()
+{
+}

src/lib_gui/utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorMac.h

@@ -0,0 +1,13 @@
+#ifndef JRE_SYSTEM_LIBRARY_PATH_DETECTOR_MAC_H
+#define JRE_SYSTEM_LIBRARY_PATH_DETECTOR_MAC_H
+
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetector.h"
+
+class JreSystemLibraryPathDetectorMac: public JreSystemLibraryPathDetector
+{
+public:
+	JreSystemLibraryPathDetectorMac(const std::string javaVersion);
+	virtual ~JreSystemLibraryPathDetectorMac();
+};
+
+#endif // JRE_SYSTEM_LIBRARY_PATH_DETECTOR_MAC_H

src/lib_gui/utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorWindows.cpp

@@ -0,0 +1,12 @@
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorWindows.h"
+
+#include "utility/path_detector/java_runtime/JavaPathDetectorWindows.h"
+
+JreSystemLibraryPathDetectorWindows::JreSystemLibraryPathDetectorWindows(const std::string javaVersion)
+	: JreSystemLibraryPathDetector(std::make_shared<JavaPathDetectorWindows>(javaVersion))
+{
+}
+
+JreSystemLibraryPathDetectorWindows::~JreSystemLibraryPathDetectorWindows()
+{
+}

src/lib_gui/utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorWindows.h

@@ -0,0 +1,13 @@
+#ifndef JRE_SYSTEM_LIBRARY_PATH_DETECTOR_WINDOWS_H
+#define JRE_SYSTEM_LIBRARY_PATH_DETECTOR_WINDOWS_H
+
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetector.h"
+
+class JreSystemLibraryPathDetectorWindows: public JreSystemLibraryPathDetector
+{
+public:
+	JreSystemLibraryPathDetectorWindows(const std::string javaVersion);
+	virtual ~JreSystemLibraryPathDetectorWindows();
+};
+
+#endif // JRE_SYSTEM_LIBRARY_PATH_DETECTOR_WINDOWS_H

src/lib_gui/utility/utilityPathDetection.cpp

@@ -6,6 +6,10 @@
 #include "utility/path_detector/java_runtime/JavaPathDetectorMac.h"
 #include "utility/path_detector/java_runtime/JavaPathDetectorWindows.h"
 
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorLinux.h"
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorMac.h"
+#include "utility/path_detector/jre_system_library/JreSystemLibraryPathDetectorWindows.h"
+
 #include "utility/path_detector/maven_executable/MavenPathDetectorUnix.h"
 #include "utility/path_detector/maven_executable/MavenPathDetectorWindows.h"
 
@@ -32,6 +36,25 @@ std::shared_ptr<CombinedPathDetector> utility::getJavaRuntimePathDetector()
 	return combinedDetector;
 }
 
+std::shared_ptr<CombinedPathDetector> utility::getJreSystemLibraryPathsDetector()
+{
+	std::shared_ptr<CombinedPathDetector> combinedDetector = std::make_shared<CombinedPathDetector>();
+	if (QSysInfo::windowsVersion() != QSysInfo::WV_None)
+	{
+		combinedDetector->addDetector(std::make_shared<JreSystemLibraryPathDetectorWindows>("1.8"));
+	}
+	else if (QSysInfo::macVersion() != QSysInfo::MV_None)
+	{
+		combinedDetector->addDetector(std::make_shared<JreSystemLibraryPathDetectorMac>("1.8"));
+	}
+	else
+	{
+		combinedDetector->addDetector(std::make_shared<JreSystemLibraryPathDetectorLinux>("1.8"));
+	}
+
+	return combinedDetector;
+}
+
 std::shared_ptr<CombinedPathDetector> utility::getMavenExecutablePathDetector()
 {
 	std::shared_ptr<CombinedPathDetector> combinedDetector = std::make_shared<CombinedPathDetector>();

src/lib_gui/utility/utilityPathDetection.h

@@ -6,6 +6,7 @@
 namespace utility
 {
 	std::shared_ptr<CombinedPathDetector> getJavaRuntimePathDetector();
+	std::shared_ptr<CombinedPathDetector> getJreSystemLibraryPathsDetector();
 	std::shared_ptr<CombinedPathDetector> getMavenExecutablePathDetector();
 
 	std::shared_ptr<CombinedPathDetector> getCxxVsHeaderPathDetector();

src/lib_java/project/SourceGroupJava.cpp

@@ -184,7 +184,7 @@ std::vector<FilePath> SourceGroupJava::getClassPath()
 
 	std::vector<FilePath> classPath;
 
-	for (const FilePath& classpath: m_settings->getClasspathsExpandedAndAbsolute())
+	for (const FilePath& classpath: m_settings->getClasspathExpandedAndAbsolute())
 	{
 		if (classpath.exists())
 		{
@@ -193,6 +193,15 @@ std::vector<FilePath> SourceGroupJava::getClassPath()
 		}
 	}
 
+	if (m_settings->getUseJreSystemLibrary())
+	{
+		for (const FilePath& systemLibraryPath: ApplicationSettings::getInstance()->getJreSystemLibraryPathsExpanded())
+		{
+			LOG_INFO("Adding JRE system library path to classpath: " + systemLibraryPath.str());
+			classPath.push_back(systemLibraryPath);
+		}
+	}
+
 	if (m_settings->getMavenDependenciesDirectoryExpandedAndAbsolute().exists())
 	{
 		std::vector<FilePath> mavenJarPaths = FileSystem::getFilePathsFromDirectory(