Default method using explicitly comma

jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java

diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java
index cf56f69..bf98ee3 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java
@@ -194,7 +194,7 @@
     public String getHeaderString(String name);
 
     /**
-     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     * Checks whether a header with a specific name and value (or item of the token-separated value list) exists.
      *
      * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
@@ -210,7 +210,7 @@
      * @param valueSeparatorRegex Separates the header value into single values. {@code null} does not split.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
-     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * matching the predicate, or having at least one whitespace-trimmed single value in a token-separated list of single values.
      * @see #getHeaders()
      * @see #getHeaderString(String)
      * @since 4.0
@@ -218,6 +218,31 @@
     public boolean containsHeaderString(String name, String valueSeparatorRegex, Predicate<String> valuePredicate);
 
     /**
+     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     *
+     * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
+     * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
+     * class or using its {@code toString} method if a header delegate is not available.
+     *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
+     * @param name the message header.
+     * @param valuePredicate value must fulfil this predicate.
+     * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
+     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * @see #getHeaders()
+     * @see #getHeaderString(String)
+     * @since 4.0
+     */
+    default public boolean containsHeaderString(String name, Predicate<String> valuePredicate) {
+        return containsHeaderString(name, ",", valuePredicate);
+    }
+
+    /**
      * Get message date.
      *
      * @return the message date, otherwise {@code null} if not present.

jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientResponseContext.java

diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientResponseContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientResponseContext.java
index 7956d31..2ba9962 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientResponseContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientResponseContext.java
@@ -90,7 +90,7 @@
     public String getHeaderString(String name);
 
     /**
-     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     * Checks whether a header with a specific name and value (or item of the token-separated value list) exists.
      *
      * <p>
      * For example: {@code containsHeaderString("cache-control", ",", "no-store"::equalsIgnoreCase)} will return {@code true} if
@@ -102,7 +102,7 @@
      * @param valueSeparatorRegex Separates the header value into single values. {@code null} does not split.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
-     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * matching the predicate, or having at least one whitespace-trimmed single value in a token-separated list of single values.
      * @see #getHeaders()
      * @see #getHeaderString(String)
      * @since 4.0
@@ -110,6 +110,27 @@
     public boolean containsHeaderString(String name, String valueSeparatorRegex, Predicate<String> valuePredicate);
 
     /**
+     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
+     * @param name the message header.
+     * @param valuePredicate value must fulfil this predicate.
+     * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
+     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * @see #getHeaders()
+     * @see #getHeaderString(String)
+     * @since 4.0
+     */
+    default public boolean containsHeaderString(String name, Predicate<String> valuePredicate) {
+        return containsHeaderString(name, ",", valuePredicate);
+    }
+
+    /**
      * Get the allowed HTTP methods from the Allow HTTP header.
      *
      * @return the allowed HTTP methods, all methods will returned as upper case strings.

jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerRequestContext.java

diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerRequestContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerRequestContext.java
index 6046edf..6577f3c 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerRequestContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerRequestContext.java
@@ -230,7 +230,7 @@
     public String getHeaderString(String name);
 
     /**
-     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     * Checks whether a header with a specific name and value (or item of the token-separated value list) exists.
      *
      * <p>
      * For example: {@code containsHeaderString("cache-control", ",", "no-store"::equalsIgnoreCase)} will return {@code true} if
@@ -242,7 +242,7 @@
      * @param valueSeparatorRegex Separates the header value into single values. {@code null} does not split.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
-     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * matching the predicate, or having at least one whitespace-trimmed single value in a token-separated list of single values.
      * @see #getHeaders()
      * @see #getHeaderString(String)
      * @since 4.0
@@ -250,6 +250,27 @@
     public boolean containsHeaderString(String name, String valueSeparatorRegex, Predicate<String> valuePredicate);
 
     /**
+     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
+     * @param name the message header.
+     * @param valuePredicate value must fulfil this predicate.
+     * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
+     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * @see #getHeaders()
+     * @see #getHeaderString(String)
+     * @since 4.0
+     */
+    default public boolean containsHeaderString(String name, Predicate<String> valuePredicate) {
+        return containsHeaderString(name, ",", valuePredicate);
+    }
+
+    /**
      * Get message date.
      *
      * @return the message date, otherwise {@code null} if not present.

jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java

diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java
index cfd5d70..878001a 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java
@@ -116,7 +116,7 @@
     public String getHeaderString(String name);
 
     /**
-     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     * Checks whether a header with a specific name and value (or item of the token-separated value list) exists.
      *
      * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
@@ -132,7 +132,7 @@
      * @param valueSeparatorRegex Separates the header value into single values. {@code null} does not split.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
-     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * matching the predicate, or having at least one whitespace-trimmed single value in a token-separated list of single values.
      * @see #getHeaders()
      * @see #getHeaderString(String)
      * @since 4.0
@@ -140,6 +140,31 @@
     public boolean containsHeaderString(String name, String valueSeparatorRegex, Predicate<String> valuePredicate);
 
     /**
+     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     *
+     * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
+     * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
+     * class or using its {@code toString} method if a header delegate is not available.
+     *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
+     * @param name the message header.
+     * @param valuePredicate value must fulfil this predicate.
+     * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
+     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * @see #getHeaders()
+     * @see #getHeaderString(String)
+     * @since 4.0
+     */
+    default public boolean containsHeaderString(String name, Predicate<String> valuePredicate) {
+        return containsHeaderString(name, ",", valuePredicate);
+    }
+
+    /**
      * Get the allowed HTTP methods from the Allow HTTP header.
      *
      * @return the allowed HTTP methods, all methods will returned as upper case strings.

jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java

diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java b/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java
index 802808a..62e3431 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java
@@ -62,7 +62,7 @@
     public String getHeaderString(String name);
 
     /**
-     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     * Checks whether a header with a specific name and value (or item of the token-separated value list) exists.
      *
      * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
@@ -78,7 +78,7 @@
      * @param valueSeparatorRegex Separates the header value into single values. {@code null} does not split.
      * @param valuePredicate value must fulfil this predicate.
      * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
-     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * matching the predicate, or having at least one whitespace-trimmed single value in a token-separated list of single values.
      * @see #getRequestHeaders()
      * @see #getHeaderString(String)
      * @since 4.0
@@ -86,6 +86,31 @@
     public boolean containsHeaderString(String name, String valueSeparatorRegex, Predicate<String> valuePredicate);
 
     /**
+     * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
+     *
+     * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
+     * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
+     * class or using its {@code toString} method if a header delegate is not available.
+     *
+     * <p>
+     * For example: {@code containsHeaderString("cache-control", "no-store"::equalsIgnoreCase)} will return {@code true} if
+     * a {@code Cache-Control} header exists that has the value {@code no-store}, the value {@code No-Store} or the value
+     * {@code Max-Age, NO-STORE, no-transform}, but {@code false} when it has the value {@code no-store;no-transform}
+     * (missing comma), or the value {@code no - store} (whitespace within value).
+     *
+     * @param name the message header.
+     * @param valuePredicate value must fulfil this predicate.
+     * @return {@code true} if and only if a header with the given name exists, having either a whitespace-trimmed value
+     * matching the predicate, or having at least one whitespace-trimmed single value in a comma-separated list of single values.
+     * @see #getRequestHeaders()
+     * @see #getHeaderString(String)
+     * @since 4.0
+     */
+    default public boolean containsHeaderString(String name, Predicate<String> valuePredicate) {
+        return containsHeaderString(name, ",", valuePredicate);
+    }
+
+    /**
      * Get the values of HTTP request headers. The returned Map is case-insensitive wrt. keys and is read-only. The method
      * never returns {@code null}.
      *