diff --git a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/ClasspathEntry.java b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/ClasspathEntry.java
index d3096680b90..e01baa3150c 100644
--- a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/ClasspathEntry.java
+++ b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/ClasspathEntry.java
@@ -2496,8 +2496,8 @@ private static IJavaModelStatus validateLibraryEntry(IPath path, IJavaProject pr
 							}
 						}
 				}
-			} else if (target instanceof File){
-				File file = JavaModel.getFile(target);
+			} else if (target instanceof File tf){
+				File file = JavaModel.getFile(tf);
 				if (file == null) {
 					if (container != null) {
 						return  new JavaModelStatus(IJavaModelStatusConstants.INVALID_CLASSPATH, Messages.bind(Messages.classpath_illegalExternalFolderInContainer, new String[] {path.toOSString(), container}));
diff --git a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaModel.java b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaModel.java
index ec3a3edd157..05d2c55f435 100644
--- a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaModel.java
+++ b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaModel.java
@@ -394,12 +394,9 @@ public static Object getExternalTarget(IPath path, boolean checkResourceExistenc
  * Helper method - returns whether an object is a file (i.e., it returns <code>true</code>
  * to {@link File#isFile()}.
  */
-public static boolean isFile(Object target) {
-	if (target instanceof File) {
-		IPath path = Path.fromOSString(((File) target).getPath());
-		return isExternalFile(path);
-	}
-	return false;
+public static boolean isFile(File target) {
+	IPath path = Path.fromOSString(target.getPath());
+	return isExternalFile(path);
 }
 
 public static boolean isJimage(File file) {
@@ -433,8 +430,8 @@ static private boolean isExternalFile(IPath path) {
  * Helper method - returns the {@link File} item if <code>target</code> is a file (i.e., the target
  * returns <code>true</code> to {@link File#isFile()}. Otherwise returns <code>null</code>.
  */
-public static File getFile(Object target) {
-	return isFile(target) ? (File) target : null;
+public static File getFile(File target) {
+	return isFile(target) ? target : null;
 }
 
 @Override
diff --git a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaModelManager.java b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaModelManager.java
index 840501bd856..fd30106aca8 100644
--- a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaModelManager.java
+++ b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaModelManager.java
@@ -2843,8 +2843,8 @@ public IClasspathEntry resolveVariableEntry(IClasspathEntry entry, boolean usePr
 							entry.isExported());
 			}
 		}
-		if (target instanceof File) {
-			File externalFile = JavaModel.getFile(target);
+		if (target instanceof File tf) {
+			File externalFile = JavaModel.getFile(tf);
 			if (externalFile != null) {
 				// external binary archive
 				return JavaCore.newLibraryEntry(
diff --git a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaProject.java b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaProject.java
index 8490fe56140..4ae24748647 100644
--- a/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaProject.java
+++ b/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaProject.java
@@ -743,10 +743,10 @@ public void computePackageFragmentRoots(
 				if (target instanceof IResource){
 					// internal target
 					root = getPackageFragmentRoot((IResource) target, entryPath, resolvedEntry.getExtraAttributes());
-				} else if (target instanceof File) {
+				} else if (target instanceof File tf) {
 					// external target
-					if (JavaModel.isFile(target)) {
-						if (JavaModel.isJimage((File) target)) {
+					if (JavaModel.isFile(tf)) {
+						if (JavaModel.isJimage(tf)) {
 							PerProjectInfo info = getPerProjectInfo();
 							ObjectVector imageRoots;
 							if (info.jrtRoots == null || !info.jrtRoots.containsKey(entryPath)) {
@@ -770,13 +770,13 @@ public void computePackageFragmentRoots(
 								}
 							}
 							accumulatedRoots.addAll(imageRoots);
-						} else if (JavaModel.isJmod((File) target)) {
+						} else if (JavaModel.isJmod(tf)) {
 							root = new JModPackageFragmentRoot(entryPath, this, resolvedEntry.getExtraAttributes());
 						}
 						else {
 							root = new JarPackageFragmentRoot(null, entryPath, this, resolvedEntry.getExtraAttributes());
 						}
-					} else if (((File) target).isDirectory()) {
+					} else if ((tf).isDirectory()) {
 						root = new ExternalPackageFragmentRoot(entryPath, this);
 					}
 				}
@@ -2278,7 +2278,7 @@ public IPackageFragmentRoot getPackageFragmentRoot0(IPath externalLibraryPath, I
 			return this.new JImageModuleFragmentBridge(externalLibraryPath, extraAttributes);
 		}
 		Object target = JavaModel.getTarget(externalLibraryPath, true/*check existency*/);
-		if (target instanceof File && JavaModel.isFile(target)) {
+		if (target instanceof File tf && JavaModel.isFile(tf)) {
 			if (JavaModel.isJmod((File) target)) {
 				return new JModPackageFragmentRoot(externalLibraryPath, this, extraAttributes);
 			}