diff --git a/src/java.base/share/classes/java/io/UnsupportedEncodingException.java b/src/java.base/share/classes/java/io/UnsupportedEncodingException.java
index b80f453f5c6..a121e243210 100644
--- a/src/java.base/share/classes/java/io/UnsupportedEncodingException.java
+++ b/src/java.base/share/classes/java/io/UnsupportedEncodingException.java
@@ -24,12 +24,16 @@
  */
 package java.io;
 
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
+
 /**
  * The Character Encoding is not supported.
  *
  * @author  Asmus Freytag
  * @since   1.1
  */
+@NullMarked
 public class UnsupportedEncodingException
     extends IOException
 {
@@ -47,7 +51,7 @@ public UnsupportedEncodingException() {
      * Constructs an UnsupportedEncodingException with a detail message.
      * @param s Describes the reason for the exception.
      */
-    public UnsupportedEncodingException(String s) {
+    public UnsupportedEncodingException(@Nullable String s) {
         super(s);
     }
 }
diff --git a/src/java.base/share/classes/java/lang/MatchException.java b/src/java.base/share/classes/java/lang/MatchException.java
index 832d71bcb1d..f87f44c6f85 100644
--- a/src/java.base/share/classes/java/lang/MatchException.java
+++ b/src/java.base/share/classes/java/lang/MatchException.java
@@ -25,6 +25,9 @@
 
 package java.lang;
 
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
+
 /**
  * Thrown to indicate an unexpected failure in pattern matching.
  *
@@ -76,6 +79,7 @@
  *
  * @since 21
  */
+@NullMarked
 public final class MatchException extends RuntimeException {
     @java.io.Serial
     private static final long serialVersionUID = 0L;
@@ -91,7 +95,7 @@ public final class MatchException extends RuntimeException {
      *         permitted, and indicates that the cause is nonexistent or
      *         unknown.)
      */
-    public MatchException(String message, Throwable cause) {
+    public MatchException(@Nullable String message, @Nullable Throwable cause) {
         super(message, cause);
     }
 }
diff --git a/src/java.base/share/classes/java/nio/charset/MalformedInputException.java b/src/java.base/share/classes/java/nio/charset/MalformedInputException.java
index a4e7f31fc2c..352ec83887e 100644
--- a/src/java.base/share/classes/java/nio/charset/MalformedInputException.java
+++ b/src/java.base/share/classes/java/nio/charset/MalformedInputException.java
@@ -25,6 +25,7 @@
 
 package java.nio.charset;
 
+import org.jspecify.annotations.NullMarked;
 
 /**
  * Checked exception thrown when an input byte sequence is not legal for given
@@ -33,7 +34,7 @@
  *
  * @since 1.4
  */
-
+@NullMarked
 public class MalformedInputException
     extends CharacterCodingException
 {
diff --git a/src/java.base/share/classes/java/nio/charset/UnmappableCharacterException.java b/src/java.base/share/classes/java/nio/charset/UnmappableCharacterException.java
index 8f79a232f03..f844c95096a 100644
--- a/src/java.base/share/classes/java/nio/charset/UnmappableCharacterException.java
+++ b/src/java.base/share/classes/java/nio/charset/UnmappableCharacterException.java
@@ -25,6 +25,7 @@
 
 package java.nio.charset;
 
+import org.jspecify.annotations.NullMarked;
 
 /**
  * Checked exception thrown when an input character (or byte) sequence
@@ -33,7 +34,7 @@
  *
  * @since 1.4
  */
-
+@NullMarked
 public class UnmappableCharacterException
     extends CharacterCodingException
 {