Connect/Java: Clarify JDBC examples need Java 21 (JEP 330 => JEP 445)

Previously, the docs stated Java 25 would be required, which isn't true.

Author: amotl

docs/_include/logos.md

@@ -1,11 +1,13 @@
 <!-- markdownlint-disable MD034 -->
 <!-- markdownlint-disable MD053 -->
 
+[CrateDB home]: https://cratedb.com/
 [CrateDB logo]: https://avatars.githubusercontent.com/u/4048232?s=200&v=4
 [Hibernate logo]: https://logo.svgcdn.com/devicon/hibernate-original.svg
 [jOOQ logo]: https://www.jooq.org/img/jooq-logo-black.png
 [JUnit home]: https://junit.org/
 [JUnit logo]: https://avatars.githubusercontent.com/u/874086?s=200&v=4
+[PostgreSQL home]: https://www.postgresql.org/
 [PostgreSQL logo]: https://jdbc.postgresql.org/icons/postgreslogo.svg
 [Testcontainers for Java]: https://testcontainers.com/guides/getting-started-with-testcontainers-for-java/
 [Testcontainers logo]: https://avatars.githubusercontent.com/u/13393021?s=200&v=4

docs/connect/java/cratedb-jdbc.md

@@ -1,8 +1,17 @@
+:::{include} /_include/logos.md
+:::
+
 (crate-jdbc)=
 (cratedb-jdbc)=
 
 # CrateDB JDBC
 
+```{div} .float-right
+[![CrateDB logo][CrateDB logo]{height=40px loading=lazy}][CrateDB home]
+```
+```{div} .clearfix
+```
+
 :::{include} /_include/links.md
 :::
 
@@ -16,7 +25,7 @@ Connect to CrateDB using CrateDB JDBC.
 :::{div}
 The [CrateDB JDBC Driver] is an open-source JDBC driver written in
 Pure Java (Type 4), which communicates using the PostgreSQL native
-network protocol.
+network protocol. CrateDB JDBC needs Java >= 11.
 :::
 
 :::{rubric} Synopsis
@@ -67,7 +76,7 @@ of `wget`.
 Invoke-WebRequest https://repo1.maven.org/maven2/io/crate/crate-jdbc-standalone/2.7.0/crate-jdbc-standalone-2.7.0.jar -OutFile crate-jdbc-standalone-2.7.0.jar
 ```
 :::
-Invoke program. Needs Java >= 25 ([JEP 330]).
+Invoke program. Needs Java >= 21 ([JEP 445]), alternatively see [](#full-example).
 ```shell
 java -cp crate-jdbc-standalone-2.7.0.jar example.java
 ```
@@ -135,4 +144,4 @@ dependencies {
 :::
 
 
-[JEP 330]: https://openjdk.org/jeps/330
+[JEP 445]: https://openjdk.org/jeps/445

docs/connect/java/postgresql-jdbc.md

@@ -1,8 +1,17 @@
+:::{include} /_include/logos.md
+:::
+
 (pgjdbc)=
 (postgresql-jdbc)=
 
 # PostgreSQL JDBC
 
+```{div} .float-right
+[![PostgreSQL logo][PostgreSQL logo]{height=40px loading=lazy}][PostgreSQL home]
+```
+```{div} .clearfix
+```
+
 :::{include} /_include/links.md
 :::
 
@@ -16,7 +25,7 @@ Connect to CrateDB using PostgreSQL JDBC.
 :::{div}
 The [PostgreSQL JDBC Driver] is an open-source JDBC driver written in
 Pure Java (Type 4), which communicates using the PostgreSQL native
-network protocol.
+network protocol. PostgreSQL JDBC needs Java >= 8.
 :::
 
 :::{rubric} Synopsis
@@ -67,7 +76,7 @@ of `wget`.
 Invoke-WebRequest https://repo1.maven.org/maven2/org/postgresql/postgresql/42.7.8/postgresql-42.7.8.jar -OutFile postgresql-42.7.8.jar
 ```
 :::
-Invoke program. Needs Java >= 25 ([JEP 330]).
+Invoke program. Needs Java >= 21 ([JEP 445]), alternatively see [](#full-example).
 ```shell
 java -cp postgresql-42.7.8.jar example.java
 ```
@@ -133,4 +142,4 @@ dependencies {
 :::
 
 
-[JEP 330]: https://openjdk.org/jeps/330
+[JEP 445]: https://openjdk.org/jeps/445