diff --git a/src/java.base/share/classes/sun/security/ec/ECPublicKeyImpl.java b/src/java.base/share/classes/sun/security/ec/ECPublicKeyImpl.java
index 8f099f1e52f..29894038a1d 100644
--- a/src/java.base/share/classes/sun/security/ec/ECPublicKeyImpl.java
+++ b/src/java.base/share/classes/sun/security/ec/ECPublicKeyImpl.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -33,6 +33,7 @@ import java.security.*;
 import java.security.interfaces.*;
 import java.security.spec.*;
 
+import sun.security.util.BitArray;
 import sun.security.util.ECParameters;
 import sun.security.util.ECUtil;
 
@@ -59,7 +60,6 @@ public final class ECPublicKeyImpl extends X509Key implements ECPublicKey {
      * Construct a key from its components. Used by the
      * ECKeyFactory.
      */
-    @SuppressWarnings("deprecation")
     ECPublicKeyImpl(ECPoint w, ECParameterSpec params)
             throws InvalidKeyException {
         this.w = w;
@@ -67,7 +67,8 @@ public final class ECPublicKeyImpl extends X509Key implements ECPublicKey {
         // generate the encoding
         algid = new AlgorithmId
             (AlgorithmId.EC_oid, ECParameters.getAlgorithmParameters(params));
-        key = ECUtil.encodePoint(w, params.getCurve());
+        byte[] key = ECUtil.encodePoint(w, params.getCurve());
+        setKey(new BitArray(key.length * 8, key));
     }
 
     /**
@@ -92,17 +93,9 @@ public final class ECPublicKeyImpl extends X509Key implements ECPublicKey {
         return params;
     }
 
-    // Internal API to get the encoded point. Currently used by SunPKCS11.
-    // This may change/go away depending on what we do with the public API.
-    @SuppressWarnings("deprecation")
-    public byte[] getEncodedPublicValue() {
-        return key.clone();
-    }
-
     /**
      * Parse the key. Called by X509Key.
      */
-    @SuppressWarnings("deprecation")
     protected void parseKeyBits() throws InvalidKeyException {
         AlgorithmParameters algParams = this.algid.getParameters();
         if (algParams == null) {
@@ -112,7 +105,7 @@ public final class ECPublicKeyImpl extends X509Key implements ECPublicKey {
 
         try {
             params = algParams.getParameterSpec(ECParameterSpec.class);
-            w = ECUtil.decodePoint(key, params.getCurve());
+            w = ECUtil.decodePoint(getKey().toByteArray(), params.getCurve());
         } catch (IOException | InvalidParameterSpecException e) {
             throw new InvalidKeyException("Invalid EC key", e);
         }
diff --git a/src/java.base/share/classes/sun/security/x509/X509Key.java b/src/java.base/share/classes/sun/security/x509/X509Key.java
index 05d473a86be..719748394e1 100644
--- a/src/java.base/share/classes/sun/security/x509/X509Key.java
+++ b/src/java.base/share/classes/sun/security/x509/X509Key.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1996, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -65,24 +65,6 @@ public class X509Key implements PublicKey, DerEncoder {
     /* The algorithm information (name, parameters, etc). */
     protected AlgorithmId algid;
 
-    /**
-     * The key bytes, without the algorithm information.
-     * @deprecated Use the BitArray form which does not require keys to
-     * be byte aligned.
-     * @see sun.security.x509.X509Key#setKey(BitArray)
-     * @see sun.security.x509.X509Key#getKey()
-     */
-    @Deprecated
-    protected byte[] key = null;
-
-    /*
-     * The number of bits unused in the last byte of the key.
-     * Added to keep the byte[] key form consistent with the BitArray
-     * form. Can de deleted when byte[] key is deleted.
-     */
-    @Deprecated
-    private int unusedBits = 0;
-
     /* BitArray form of key */
     private transient BitArray bitStringKey = null;
 
@@ -112,15 +94,6 @@ public class X509Key implements PublicKey, DerEncoder {
      */
     protected void setKey(BitArray key) {
         this.bitStringKey = (BitArray)key.clone();
-
-        /*
-         * Do this to keep the byte array form consistent with
-         * this. Can delete when byte[] key is deleted.
-         */
-        this.key = key.toByteArray();
-        int remaining = key.length() % 8;
-        this.unusedBits =
-            ((remaining == 0) ? 0 : 8 - remaining);
     }
 
     /**
@@ -128,18 +101,6 @@ public class X509Key implements PublicKey, DerEncoder {
      * @return a BitArray containing the key.
      */
     protected BitArray getKey() {
-        /*
-         * Do this for consistency in case a subclass
-         * modifies byte[] key directly. Remove when
-         * byte[] key is deleted.
-         * Note: the consistency checks fail when the subclass
-         * modifies a non byte-aligned key (into a byte-aligned key)
-         * using the deprecated byte[] key field.
-         */
-        this.bitStringKey = new BitArray(
-                          this.key.length * 8 - this.unusedBits,
-                          this.key);
-
         return (BitArray)bitStringKey.clone();
     }
 
@@ -331,7 +292,7 @@ public class X509Key implements PublicKey, DerEncoder {
         HexDumpEncoder  encoder = new HexDumpEncoder();
 
         return "algorithm = " + algid.toString()
-            + ", unparsed keybits = \n" + encoder.encodeBuffer(key);
+            + ", unparsed keybits = \n" + encoder.encodeBuffer(bitStringKey.toByteArray());
     }
 
     /**