diff --git a/core/java/android/net/DataUsageRequest.java b/core/java/android/net/DataUsageRequest.java
index 0ac8f7e7..b06d515 100644
--- a/core/java/android/net/DataUsageRequest.java
+++ b/core/java/android/net/DataUsageRequest.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.Nullable;
 import android.net.NetworkTemplate;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -95,7 +96,7 @@
     }
 
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (obj instanceof DataUsageRequest == false) return false;
         DataUsageRequest that = (DataUsageRequest) obj;
         return that.requestId == this.requestId
diff --git a/core/java/android/net/DhcpResults.java b/core/java/android/net/DhcpResults.java
index ef0a436..82ba156 100644
--- a/core/java/android/net/DhcpResults.java
+++ b/core/java/android/net/DhcpResults.java
@@ -160,7 +160,7 @@
     }
 
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (this == obj) return true;
 
         if (!(obj instanceof DhcpResults)) return false;
diff --git a/core/java/android/net/Ikev2VpnProfile.java b/core/java/android/net/Ikev2VpnProfile.java
index 63fc5f2..183f500 100644
--- a/core/java/android/net/Ikev2VpnProfile.java
+++ b/core/java/android/net/Ikev2VpnProfile.java
@@ -360,7 +360,7 @@
     }
 
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (!(obj instanceof Ikev2VpnProfile)) {
             return false;
         }
diff --git a/core/java/android/net/IpSecTransform.java b/core/java/android/net/IpSecTransform.java
index aa7811a..b48c1fd 100644
--- a/core/java/android/net/IpSecTransform.java
+++ b/core/java/android/net/IpSecTransform.java
@@ -19,6 +19,7 @@
 
 import android.annotation.IntDef;
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.RequiresFeature;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
@@ -150,7 +151,7 @@
     /**
      * Standard equals.
      */
-    public boolean equals(Object other) {
+    public boolean equals(@Nullable Object other) {
         if (this == other) return true;
         if (!(other instanceof IpSecTransform)) return false;
         final IpSecTransform rhs = (IpSecTransform) other;
diff --git a/core/java/android/net/MatchAllNetworkSpecifier.java b/core/java/android/net/MatchAllNetworkSpecifier.java
index 011a04c..9a11be0 100644
--- a/core/java/android/net/MatchAllNetworkSpecifier.java
+++ b/core/java/android/net/MatchAllNetworkSpecifier.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -44,7 +45,7 @@
     }
 
     @Override
-    public boolean equals(Object o) {
+    public boolean equals(@Nullable Object o) {
         return o instanceof MatchAllNetworkSpecifier;
     }
 
diff --git a/core/java/android/net/NetworkIdentity.java b/core/java/android/net/NetworkIdentity.java
index 521ed9b..5d8122b 100644
--- a/core/java/android/net/NetworkIdentity.java
+++ b/core/java/android/net/NetworkIdentity.java
@@ -18,6 +18,7 @@
 
 import static android.net.ConnectivityManager.TYPE_WIFI;
 
+import android.annotation.Nullable;
 import android.content.Context;
 import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
@@ -67,7 +68,7 @@
     }
 
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (obj instanceof NetworkIdentity) {
             final NetworkIdentity ident = (NetworkIdentity) obj;
             return mType == ident.mType && mSubType == ident.mSubType && mRoaming == ident.mRoaming
diff --git a/core/java/android/net/NetworkPolicy.java b/core/java/android/net/NetworkPolicy.java
index 4f05c9b..8a0211c 100644
--- a/core/java/android/net/NetworkPolicy.java
+++ b/core/java/android/net/NetworkPolicy.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.Nullable;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -205,7 +206,7 @@
     }
 
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (obj instanceof NetworkPolicy) {
             final NetworkPolicy other = (NetworkPolicy) obj;
             return warningBytes == other.warningBytes
diff --git a/core/java/android/net/NetworkScorerAppData.java b/core/java/android/net/NetworkScorerAppData.java
index 116e39e..caa6e45 100644
--- a/core/java/android/net/NetworkScorerAppData.java
+++ b/core/java/android/net/NetworkScorerAppData.java
@@ -110,7 +110,7 @@
     }
 
     @Override
-    public boolean equals(Object o) {
+    public boolean equals(@Nullable Object o) {
         if (this == o) return true;
         if (o == null || getClass() != o.getClass()) return false;
         NetworkScorerAppData that = (NetworkScorerAppData) o;
diff --git a/core/java/android/net/NetworkStats.java b/core/java/android/net/NetworkStats.java
index cf40ce5..d42beae 100644
--- a/core/java/android/net/NetworkStats.java
+++ b/core/java/android/net/NetworkStats.java
@@ -412,7 +412,7 @@
 
         /** @hide */
         @Override
-        public boolean equals(Object o) {
+        public boolean equals(@Nullable Object o) {
             if (o instanceof Entry) {
                 final Entry e = (Entry) o;
                 return uid == e.uid && set == e.set && tag == e.tag && metered == e.metered
diff --git a/core/java/android/net/NetworkTemplate.java b/core/java/android/net/NetworkTemplate.java
index 2322048..aa61e03 100644
--- a/core/java/android/net/NetworkTemplate.java
+++ b/core/java/android/net/NetworkTemplate.java
@@ -329,7 +329,7 @@
     }
 
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (obj instanceof NetworkTemplate) {
             final NetworkTemplate other = (NetworkTemplate) obj;
             return mMatchRule == other.mMatchRule
diff --git a/core/java/android/net/StringNetworkSpecifier.java b/core/java/android/net/StringNetworkSpecifier.java
index 3f2aa17..012410b 100644
--- a/core/java/android/net/StringNetworkSpecifier.java
+++ b/core/java/android/net/StringNetworkSpecifier.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
@@ -45,7 +46,7 @@
     }
 
     @Override
-    public boolean equals(Object o) {
+    public boolean equals(@Nullable Object o) {
         if (!(o instanceof StringNetworkSpecifier)) return false;
         return TextUtils.equals(specifier, ((StringNetworkSpecifier) o).specifier);
     }
diff --git a/core/java/android/net/TelephonyNetworkSpecifier.java b/core/java/android/net/TelephonyNetworkSpecifier.java
index 33c71d5..3348233 100644
--- a/core/java/android/net/TelephonyNetworkSpecifier.java
+++ b/core/java/android/net/TelephonyNetworkSpecifier.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -74,7 +75,7 @@
     }
 
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (this == obj) {
             return true;
         }
diff --git a/core/java/android/net/UidRange.java b/core/java/android/net/UidRange.java
index d75c43d..3bc0f9c 100644
--- a/core/java/android/net/UidRange.java
+++ b/core/java/android/net/UidRange.java
@@ -18,6 +18,7 @@
 
 import static android.os.UserHandle.PER_USER_RANGE;
 
+import android.annotation.Nullable;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -81,7 +82,7 @@
     }
 
     @Override
-    public boolean equals(Object o) {
+    public boolean equals(@Nullable Object o) {
         if (this == o) {
             return true;
         }
diff --git a/core/java/android/net/Uri.java b/core/java/android/net/Uri.java
index 1cb4fe8..ffe4f3c 100644
--- a/core/java/android/net/Uri.java
+++ b/core/java/android/net/Uri.java
@@ -343,7 +343,7 @@
      * default port explicitly and the other leaves it implicit, they will not
      * be considered equal.
      */
-    public boolean equals(Object o) {
+    public boolean equals(@Nullable Object o) {
         if (!(o instanceof Uri)) {
             return false;
         }
diff --git a/packages/Connectivity/framework/src/android/net/CaptivePortalData.java b/packages/Connectivity/framework/src/android/net/CaptivePortalData.java
index 18467fa..9b56b23 100644
--- a/packages/Connectivity/framework/src/android/net/CaptivePortalData.java
+++ b/packages/Connectivity/framework/src/android/net/CaptivePortalData.java
@@ -276,7 +276,7 @@
     }
 
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (!(obj instanceof CaptivePortalData)) return false;
         final CaptivePortalData other = (CaptivePortalData) obj;
         return mRefreshTimeMillis == other.mRefreshTimeMillis
diff --git a/packages/Connectivity/framework/src/android/net/IpConfiguration.java b/packages/Connectivity/framework/src/android/net/IpConfiguration.java
index 0b20564..d5f8b2e 100644
--- a/packages/Connectivity/framework/src/android/net/IpConfiguration.java
+++ b/packages/Connectivity/framework/src/android/net/IpConfiguration.java
@@ -167,7 +167,7 @@
     }
 
     @Override
-    public boolean equals(Object o) {
+    public boolean equals(@Nullable Object o) {
         if (o == this) {
             return true;
         }
diff --git a/packages/Connectivity/framework/src/android/net/IpPrefix.java b/packages/Connectivity/framework/src/android/net/IpPrefix.java
index e7c8014..bcb65fa 100644
--- a/packages/Connectivity/framework/src/android/net/IpPrefix.java
+++ b/packages/Connectivity/framework/src/android/net/IpPrefix.java
@@ -18,6 +18,7 @@
 
 import android.annotation.IntRange;
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -124,7 +125,7 @@
      * @return {@code true} if both objects are equal, {@code false} otherwise.
      */
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (!(obj instanceof IpPrefix)) {
             return false;
         }
diff --git a/packages/Connectivity/framework/src/android/net/LinkAddress.java b/packages/Connectivity/framework/src/android/net/LinkAddress.java
index 44d25a1..d1bdaa0 100644
--- a/packages/Connectivity/framework/src/android/net/LinkAddress.java
+++ b/packages/Connectivity/framework/src/android/net/LinkAddress.java
@@ -349,7 +349,7 @@
      * @return {@code true} if both objects are equal, {@code false} otherwise.
      */
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (!(obj instanceof LinkAddress)) {
             return false;
         }
diff --git a/packages/Connectivity/framework/src/android/net/LinkProperties.java b/packages/Connectivity/framework/src/android/net/LinkProperties.java
index 486e2d7..e41ed72 100644
--- a/packages/Connectivity/framework/src/android/net/LinkProperties.java
+++ b/packages/Connectivity/framework/src/android/net/LinkProperties.java
@@ -1613,7 +1613,7 @@
      * @return {@code true} if both objects are equal, {@code false} otherwise.
      */
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (this == obj) return true;
 
         if (!(obj instanceof LinkProperties)) return false;
diff --git a/packages/Connectivity/framework/src/android/net/MacAddress.java b/packages/Connectivity/framework/src/android/net/MacAddress.java
index c7116b4..c83c23a 100644
--- a/packages/Connectivity/framework/src/android/net/MacAddress.java
+++ b/packages/Connectivity/framework/src/android/net/MacAddress.java
@@ -161,7 +161,7 @@
     }
 
     @Override
-    public boolean equals(Object o) {
+    public boolean equals(@Nullable Object o) {
         return (o instanceof MacAddress) && ((MacAddress) o).mAddr == mAddr;
     }
 
diff --git a/packages/Connectivity/framework/src/android/net/Network.java b/packages/Connectivity/framework/src/android/net/Network.java
index b07bd68..46141e0 100644
--- a/packages/Connectivity/framework/src/android/net/Network.java
+++ b/packages/Connectivity/framework/src/android/net/Network.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
@@ -510,7 +511,7 @@
     };
 
     @Override
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (!(obj instanceof Network)) return false;
         Network other = (Network)obj;
         return this.netId == other.netId;
diff --git a/packages/Connectivity/framework/src/android/net/NetworkRequest.java b/packages/Connectivity/framework/src/android/net/NetworkRequest.java
index 04011fc..c4d1b09 100644
--- a/packages/Connectivity/framework/src/android/net/NetworkRequest.java
+++ b/packages/Connectivity/framework/src/android/net/NetworkRequest.java
@@ -567,7 +567,7 @@
         proto.end(token);
     }
 
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (obj instanceof NetworkRequest == false) return false;
         NetworkRequest that = (NetworkRequest)obj;
         return (that.legacyType == this.legacyType &&
diff --git a/packages/Connectivity/framework/src/android/net/ProxyInfo.java b/packages/Connectivity/framework/src/android/net/ProxyInfo.java
index c9bca28..9c9fed1 100644
--- a/packages/Connectivity/framework/src/android/net/ProxyInfo.java
+++ b/packages/Connectivity/framework/src/android/net/ProxyInfo.java
@@ -275,7 +275,7 @@
     }
 
     @Override
-    public boolean equals(Object o) {
+    public boolean equals(@Nullable Object o) {
         if (!(o instanceof ProxyInfo)) return false;
         ProxyInfo p = (ProxyInfo)o;
         // If PAC URL is present in either then they must be equal.
diff --git a/packages/Connectivity/framework/src/android/net/RouteInfo.java b/packages/Connectivity/framework/src/android/net/RouteInfo.java
index 94f849f..5b6684a 100644
--- a/packages/Connectivity/framework/src/android/net/RouteInfo.java
+++ b/packages/Connectivity/framework/src/android/net/RouteInfo.java
@@ -534,7 +534,7 @@
      * Compares this RouteInfo object against the specified object and indicates if they are equal.
      * @return {@code true} if the objects are equal, {@code false} otherwise.
      */
-    public boolean equals(Object obj) {
+    public boolean equals(@Nullable Object obj) {
         if (this == obj) return true;
 
         if (!(obj instanceof RouteInfo)) return false;
@@ -570,7 +570,7 @@
         }
 
         @Override
-        public boolean equals(Object o) {
+        public boolean equals(@Nullable Object o) {
             if (!(o instanceof RouteKey)) {
                 return false;
             }