Add type annotation quick-fixes

- add new TypeAnnotationsSubProcessor
- enable quick-fix for type annotation problems in QuickFixProcessor
- add new TypeAnnotationQuickFixTest

Author: jjohnstn

org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/corrections/QuickFixProcessor.java

@@ -75,6 +75,7 @@
 import org.eclipse.jdt.ls.core.internal.handlers.OrganizeImportsHandler;
 import org.eclipse.jdt.ls.core.internal.text.correction.ModifierCorrectionSubProcessor;
 import org.eclipse.jdt.ls.core.internal.text.correction.NullAnnotationsCorrectionProcessor;
+import org.eclipse.jdt.ls.core.internal.text.correction.TypeAnnotationSubProcessor;
 import org.eclipse.jdt.ls.core.internal.text.correction.TypeArgumentMismatchSubProcessor;
 import org.eclipse.jdt.ls.core.internal.text.correction.VarargsWarningsSubProcessor;
 import org.eclipse.jdt.ui.cleanup.CleanUpOptions;
@@ -682,14 +683,12 @@ private void process(CodeActionParams params, IInvocationContext context, IProbl
 			case IProblem.MultiConstantCaseLabelsNotSupported:
 				ReorgCorrectionsSubProcessor.getNeedHigherComplianceProposals(context, problem, proposals, JavaCore.VERSION_14);
 				break;
-			// case IProblem.TypeAnnotationAtQualifiedName:
-			// case IProblem.IllegalTypeAnnotationsInStaticMemberAccess:
-			// case IProblem.NullAnnotationAtQualifyingType:
-			// case IProblem.IllegalAnnotationForBaseType:
-			// TypeAnnotationSubProcessor.addMoveTypeAnnotationToTypeProposal(context,
-			// problem, proposals);
-			// break;
-
+			case IProblem.TypeAnnotationAtQualifiedName:
+			case IProblem.IllegalTypeAnnotationsInStaticMemberAccess:
+			case IProblem.NullAnnotationAtQualifyingType:
+			case IProblem.IllegalAnnotationForBaseType:
+				TypeAnnotationSubProcessor.addMoveTypeAnnotationToTypeProposal(context, problem, proposals);
+				break;
 			default:
 				String str = problem.toString();
 				System.out.println(str);

org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/text/correction/TypeAnnotationSubProcessor.java

@@ -0,0 +1,43 @@
+/*******************************************************************************
+ * Copyright (c) 2026 Red Hat Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Red Hat Inc. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.ls.core.internal.text.correction;
+
+import java.util.Collection;
+
+import org.eclipse.jdt.internal.ui.text.correction.TypeAnnotationBaseSubProcessor;
+import org.eclipse.jdt.internal.ui.text.correction.proposals.FixCorrectionProposalCore;
+import org.eclipse.jdt.ls.core.internal.corrections.ProposalKindWrapper;
+import org.eclipse.jdt.ls.core.internal.handlers.CodeActionHandler;
+import org.eclipse.jdt.ui.text.java.IInvocationContext;
+import org.eclipse.jdt.ui.text.java.IProblemLocation;
+import org.eclipse.lsp4j.CodeActionKind;
+
+/**
+ * @author jjohnstn
+ *
+ */
+public class TypeAnnotationSubProcessor extends TypeAnnotationBaseSubProcessor<ProposalKindWrapper> {
+
+	public static void addMoveTypeAnnotationToTypeProposal(IInvocationContext context, IProblemLocation problem, Collection<ProposalKindWrapper> proposals) {
+		new TypeAnnotationSubProcessor().getMoveTypeAnnotationToTypeProposal(context, problem, proposals);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.jdt.internal.ui.text.correction.TypeAnnotationBaseSubProcessor#fixCorrectionProposalCoreToT(org.eclipse.jdt.internal.ui.text.correction.proposals.FixCorrectionProposalCore, int)
+	 */
+	@Override
+	protected ProposalKindWrapper fixCorrectionProposalCoreToT(FixCorrectionProposalCore core, int uid) {
+		return CodeActionHandler.wrap(core, CodeActionKind.QuickFix);
+	}
+
+}