Added a segment that shows the Java version.

README.md

@@ -133,6 +133,8 @@ The segments that are currently available are:
     * `rust_version` - Display the current rust version and [logo](https://www.rust-lang.org/logos/rust-logo-blk.svg).
 * **Swift Segments:**
     * `swift_version` - Show the version number of the installed Swift.
+* **Java Segments:**
+    * `java_version` - Show the current Java version.
 
 **Cloud Segments:**
 * **AWS Segments:**

functions/icons.zsh

@@ -87,6 +87,7 @@ case $POWERLEVEL9K_MODE in
       SSH_ICON                       '(ssh)'
       VPN_ICON                       '(vpn)'
       KUBERNETES_ICON                $'\U2388'              # ⎈
+      JAVA_ICON                      $'\U2615'              # ☕︎
     )
   ;;
   'awesome-fontconfig')
@@ -158,6 +159,7 @@ case $POWERLEVEL9K_MODE in
       SSH_ICON                       '(ssh)'
       VPN_ICON                       $'\uF023'
       KUBERNETES_ICON                $'\U2388'              # ⎈
+      JAVA_ICON                      $'\U2615'              # ☕︎
     )
   ;;
   'nerdfont-complete'|'nerdfont-fontconfig')
@@ -229,6 +231,7 @@ case $POWERLEVEL9K_MODE in
       SSH_ICON                       $'\uF489'              # 
       VPN_ICON                       '(vpn)'
       KUBERNETES_ICON                $'\U2388'              # ⎈
+      JAVA_ICON                      $'\U2615'              # ☕︎
     )
   ;;
   *)
@@ -300,6 +303,7 @@ case $POWERLEVEL9K_MODE in
       SSH_ICON                       '(ssh)'
       VPN_ICON                       '(vpn)'
       KUBERNETES_ICON                $'\U2388'              # ⎈
+      JAVA_ICON                      $'\U2615'              # ☕︎
     )
   ;;
 esac

powerlevel9k.zsh-theme

@@ -1433,6 +1433,15 @@ prompt_kubecontext() {
   fi
 }
 
+# print Java version number
+prompt_java_version() {
+  local java_version
+  java_version=$(java -fullversion 2>&1 | cut -d '"' -f 2)
+
+  if [[ -n "$java_version" ]]; then
+    "$1_prompt_segment" "$0" "$2" "red" "white" "$java_version" "JAVA_ICON"
+  fi
+}
 
 ################################################################
 # Prompt processing and drawing