diff --git a/java.md b/java.md
index c91ab63..ea489ff 100644
--- a/java.md
+++ b/java.md
@@ -12,3 +12,24 @@ https://askubuntu.com/questions/1421306/how-to-install-openjdk-18
 * wget the tar
 * unpack to /opt
 * set the bin folder in the JAVA_HOME ev
+
+## 2024-12-05
+
+install java and gradle with sdkman.
+install sdkman:
+```bash
+curl -s "https://get.sdkman.io" | bash
+source "$HOME/.sdkman/bin/sdkman-init.sh"
+
+```
+
+then install java:
+
+```bash
+sdk install java
+```
+
+then install gradle:
+```bash
+sdk install java
+```