Recommend latest LTS JDK 25, but we don't require it, and use Java 11 compat

Author: ktoso

hello-swift-callback/README.md

@@ -15,7 +15,7 @@ The project consists of:
 
 Before you can build and run this project, you need to have the following installed:
 
-* **Java Development Kit (JDK)**: We recommend using JDK 21. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
+* **Java Development Kit (JDK)**: We recommend using JDK 25. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
 * **Swiftly**: You need to install [Swiftly](https://www.swift.org/install/)
 * **Swift SDK for Android**: You need to install the [Swift SDK for Android](https://swift.org/install)
 

hello-swift-library/README.md

@@ -13,7 +13,7 @@ The project consists of:
 
 Before you can build and run this project, you need to have the following installed:
 
-* **Java Development Kit (JDK)**: We recommend using JDK 21. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
+* **Java Development Kit (JDK)**: We recommend using JDK 25. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
 * **Swiftly**: You need to install [Swiftly](https://www.swift.org/install/)
 * **Swift SDK for Android**: You need to install the [Swift SDK for Android](https://swift.org/install)
 

hello-swift/README.md

@@ -15,7 +15,7 @@ The project consists of:
 
 Before you can build and run this project, you need to have the following installed:
 
-* **Java Development Kit (JDK)**: We recommend using JDK 21. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
+* **Java Development Kit (JDK)**: We recommend using JDK 25. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
 * **Swiftly**: You need to install [Swiftly](https://www.swift.org/install/)
 * **Swift SDK for Android**: You need to install the [Swift SDK for Android](https://swift.org/install)
 

native-activity/README.md

@@ -15,7 +15,7 @@ The project consists of:
 
 Before you can build and run this project, you need to have the following installed:
 
-* **Java Development Kit (JDK)**: We recommend using JDK 21. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
+* **Java Development Kit (JDK)**: We recommend using JDK 25. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
 * **Swiftly**: You need to install [Swiftly](https://www.swift.org/install/)
 * **Swift SDK for Android**: You need to install the [Swift SDK for Android](https://swift.org/install)
 * **Device/emulator with OpenGL ES support**

swift-java-hashing-example/README.md

@@ -19,7 +19,7 @@ The project is structured into two main parts:
 
 Before you can build and run this project, you need to have the following installed:
 
-* **Java Development Kit (JDK)**: We recommend using JDK 21. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
+* **Java Development Kit (JDK)**: We recommend using JDK 25. Ensure the `JAVA_HOME` environment variable is set to your JDK installation path.
 * **Swiftly**: You need to install [Swiftly](https://www.swift.org/install/)
 * **Swift SDK for Android**: You need to install the [Swift SDK for Android](https://swift.org/install)