Use method reference instead of lambdas

Method references are slightly faster than lambdas and better readable.

Change-Id: I1eb012c76a425358503f171d291d6abe9a45d219
Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>
diff --git a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/actions/breakpoints/OpenBreakpointMarkerAction.java b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/actions/breakpoints/OpenBreakpointMarkerAction.java
index ab90d02..08ba613 100644
--- a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/actions/breakpoints/OpenBreakpointMarkerAction.java
+++ b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/actions/breakpoints/OpenBreakpointMarkerAction.java
@@ -43,9 +43,9 @@
 		super(selectionProvider, ActionMessages.OpenBreakpointMarkerAction__Go_to_File_1);
 		setToolTipText(ActionMessages.OpenBreakpointMarkerAction_Go_to_File_for_Breakpoint_2);
 		ResourceLocator.imageDescriptorFromBundle("org.eclipse.ui.ide", "icons/full/elcl16/gotoobj_tsk.png") //$NON-NLS-1$ //$NON-NLS-2$
-				.ifPresent(d -> setImageDescriptor(d));
+				.ifPresent(this::setImageDescriptor);
 		ResourceLocator.imageDescriptorFromBundle("org.eclipse.ui.ide", "icons/full/dlcl16/gotoobj_tsk.png") //$NON-NLS-1$ //$NON-NLS-2$
-				.ifPresent(d -> setDisabledImageDescriptor(d));
+				.ifPresent(this::setDisabledImageDescriptor);
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(
 			this,
 			IDebugHelpContextIds.OPEN_BREAKPOINT_ACTION);
diff --git a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/views/variables/details/DefaultDetailPane.java b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/views/variables/details/DefaultDetailPane.java
index 12cd30d..6c07aaa 100644
--- a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/views/variables/details/DefaultDetailPane.java
+++ b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/views/variables/details/DefaultDetailPane.java
@@ -664,7 +664,7 @@
 	protected void createDetailContextMenu(Control menuControl) {
 		MenuManager menuMgr= new MenuManager();
 		menuMgr.setRemoveAllWhenShown(true);
-		menuMgr.addMenuListener(mgr -> fillDetailContextMenu(mgr));
+		menuMgr.addMenuListener(this::fillDetailContextMenu);
 		Menu menu= menuMgr.createContextMenu(menuControl);
 		menuControl.setMenu(menu);
 
diff --git a/org.eclipse.debug.ui/ui/org/eclipse/debug/ui/EnvironmentTab.java b/org.eclipse.debug.ui/ui/org/eclipse/debug/ui/EnvironmentTab.java
index ae81f0b..0ce851a 100644
--- a/org.eclipse.debug.ui/ui/org/eclipse/debug/ui/EnvironmentTab.java
+++ b/org.eclipse.debug.ui/ui/org/eclipse/debug/ui/EnvironmentTab.java
@@ -311,7 +311,7 @@
 		environmentTable.setContentProvider(new EnvironmentVariableContentProvider());
 		environmentTable.setLabelProvider(new EnvironmentVariableLabelProvider());
 		environmentTable.setColumnProperties(new String[] { P_VARIABLE, P_VALUE });
-		environmentTable.addSelectionChangedListener(event -> handleTableSelectionChanged(event));
+		environmentTable.addSelectionChangedListener(this::handleTableSelectionChanged);
 
 		// Setup right-click context menu
 		Menu menuTable = new Menu(table);