fix: when version is system don't emit error text on export hook

available-plugins/export/etc/jenv.d/init/export_jenv_hook.bash

@@ -2,7 +2,7 @@
 
 
  _jenv_export_hook() {
-  export JAVA_HOME=$(jenv javahome)
+  export JAVA_HOME=$(jenv javahome 2>/dev/null)
   export JENV_FORCEJAVAHOME=true
 
   if [ -e "$JAVA_HOME/bin/javac" ]

available-plugins/export/etc/jenv.d/init/export_jenv_hook.fish

@@ -3,7 +3,7 @@ function __jenv_export_hook --on-event fish_prompt
   if not type -q jenv
     return
   end
-  set -gx JAVA_HOME (jenv javahome)
+  set -gx JAVA_HOME (jenv javahome 2>/dev/null)
   set -gx JENV_FORCEJAVAHOME true
 
   if test -e "$JAVA_HOME/bin/javac"

available-plugins/export/etc/jenv.d/init/export_jenv_hook.zsh

@@ -1,7 +1,7 @@
 #export
 
  _jenv_export_hook() {
-  export JAVA_HOME=$(jenv javahome)
+  export JAVA_HOME=$(jenv javahome 2>/dev/null)
   export JENV_FORCEJAVAHOME=true
 
   if [ -e "$JAVA_HOME/bin/javac" ]

libexec/jenv-javahome

@@ -22,7 +22,7 @@ export JENV_VERSION="$(jenv-version-name)"
 export JENV_OPTIONS="$(jenv-options)"
 
 if [ "$JENV_VERSION" == "system" ]; then
-  echo "Using system JDK, no JAVA_HOME set!"
+  echo "Using system JDK, no JAVA_HOME set!" >&2
   exit 1
 fi