New UI option to configure problem severity for unused lambda parameters

Fixes #1721

Author: noopur2507

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/PreferencesMessages.java

@@ -469,6 +469,7 @@ private PreferencesMessages() {
 	public static String ProblemSeveritiesConfigurationBlock_pb_static_access_receiver_label;
 	public static String ProblemSeveritiesConfigurationBlock_pb_unused_imports_label;
 	public static String ProblemSeveritiesConfigurationBlock_pb_unused_local_label;
+	public static String ProblemSeveritiesConfigurationBlock_pb_unused_lambda_parameter_label;
 	public static String ProblemSeveritiesConfigurationBlock_pb_unused_parameter_label;
 	public static String ProblemSeveritiesConfigurationBlock_pb_unused_exception_parameter_label;
 	public static String ProblemSeveritiesConfigurationBlock_pb_unused_type_parameter;

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/PreferencesMessages.properties

@@ -492,6 +492,7 @@ ProblemSeveritiesConfigurationBlock_pb_hidden_catchblock_label=Hidden catch bloc
 ProblemSeveritiesConfigurationBlock_pb_static_access_receiver_label=Non-static access to static member:
 ProblemSeveritiesConfigurationBlock_pb_unused_imports_label=Unused &import:
 ProblemSeveritiesConfigurationBlock_pb_unused_local_label=&Value of local variable is not used:
+ProblemSeveritiesConfigurationBlock_pb_unused_lambda_parameter_label=&Value of lambda parameter is not used (22 or higher):
 ProblemSeveritiesConfigurationBlock_pb_unused_parameter_label=Value of method parameter is not used:
 ProblemSeveritiesConfigurationBlock_pb_unused_exception_parameter_label=Value of exception parameter is not used:
 ProblemSeveritiesConfigurationBlock_pb_unused_type_parameter=Unused type parameter:

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/ProblemSeveritiesConfigurationBlock.java

@@ -682,6 +682,7 @@ public String[] getResult() {
 
 	private static final Key PREF_PB_HIDDEN_CATCH_BLOCK= getJDTCoreKey(JavaCore.COMPILER_PB_HIDDEN_CATCH_BLOCK);
 	private static final Key PREF_PB_UNUSED_LOCAL= getJDTCoreKey(JavaCore.COMPILER_PB_UNUSED_LOCAL);
+	private static final Key PREF_PB_UNUSED_LAMBDA_PARAMETER= getJDTCoreKey(JavaCore.COMPILER_PB_UNUSED_LAMBDA_PARAMETER);
 	private static final Key PREF_PB_UNUSED_PARAMETER= getJDTCoreKey(JavaCore.COMPILER_PB_UNUSED_PARAMETER);
 	private static final Key PREF_PB_UNUSED_EXCEPTION_PARAMETER= getJDTCoreKey(JavaCore.COMPILER_PB_UNUSED_EXCEPTION_PARAMETER);
 	private static final Key PREF_PB_SIGNAL_PARAMETER_IN_OVERRIDING= getJDTCoreKey(JavaCore.COMPILER_PB_UNUSED_PARAMETER_WHEN_OVERRIDING_CONCRETE);
@@ -842,6 +843,7 @@ public static Key[] getKeys() {
 		return new Key[] {
 				PREF_PB_OVERRIDING_PACKAGE_DEFAULT_METHOD,
 				PREF_PB_METHOD_WITH_CONSTRUCTOR_NAME, PREF_PB_DEPRECATION, PREF_PB_TERMINAL_DEPRECATION, PREF_PB_HIDDEN_CATCH_BLOCK, PREF_PB_UNUSED_LOCAL,
+				PREF_PB_UNUSED_LAMBDA_PARAMETER,
 				PREF_PB_API_LEAKS,
 				PREF_PB_UNSTABLE_AUTO_MODULE_NAME,
 				PREF_PB_UNUSED_PARAMETER, PREF_PB_UNUSED_EXCEPTION_PARAMETER, PREF_PB_UNUSED_PARAMETER_INCLUDE_DOC_COMMENT_REFERENCE,
@@ -1201,6 +1203,9 @@ public void widgetSelected(SelectionEvent e) {
 		label= PreferencesMessages.ProblemSeveritiesConfigurationBlock_pb_unused_local_label;
 		fFilteredPrefTree.addComboBox(inner, label, PREF_PB_UNUSED_LOCAL, errorWarningInfoIgnore, errorWarningInfoIgnoreLabels, defaultIndent, section);
 
+		label= PreferencesMessages.ProblemSeveritiesConfigurationBlock_pb_unused_lambda_parameter_label;
+		fFilteredPrefTree.addComboBox(inner, label, PREF_PB_UNUSED_LAMBDA_PARAMETER, errorWarningInfoIgnore, errorWarningInfoIgnoreLabels, defaultIndent, section);
+
 		label= PreferencesMessages.ProblemSeveritiesConfigurationBlock_pb_unused_parameter_label;
 		node= fFilteredPrefTree.addComboBox(inner, label, PREF_PB_UNUSED_PARAMETER, errorWarningInfoIgnore, errorWarningInfoIgnoreLabels, defaultIndent, section);