メニューバーから Run → Set Main Project から ModuleTest を選んでメインプロジェクトに設定します。
メインプロジェクトの設定
再び、左側のプロジェクトのペインで ModuleTest を選択、右クリックしてプロダウンメニューを表示、Properties を選択してプロジェクトのプロパティ画面を表示させます。左側の Categories から Run を選び、右側の Main Class のエントリに起動するメインクラス javaversion.JavaVersion を入力して OK ボタンをクリック、プロパティ画面を閉じます。
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
...
（省略）
...
# If you specify the heap size explicitly, you may also want to enable
# Concurrent Mark & Sweep garbage collector.
# (see http://wiki.netbeans.org/FaqGCPauses)
#
netbeans_default_options="-J-XX:+UseStringDeduplication -J-Xss2m -J-Xms32m -J-Dnetbeans.logger.console=true -J-Dapple.laf.useScreenMenuBar=true -J-Dapple.awt.graphics.UseQuartz=true -J-Dsun.java2d.noddraw=true -J-Dsun.java2d.dpiaware=true -J-Dsun.zip.disableMemoryMapping=true -J-Dplugin.manager.check.updates=false -J-Dnetbeans.extbrowser.manual_chrome_plugin_install=yes -J--add-opens=java.base/java.net=ALL-UNNAMED -J--add-opens=java.base/java.lang.ref=ALL-UNNAMED -J--add-opens=java.base/java.lang=ALL-UNNAMED -J--add-opens=java.base/java.security=ALL-UNNAMED -J--add-opens=java.base/java.util=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing.plaf.basic=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing.text=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing=ALL-UNNAMED -J--add-opens=java.desktop/java.awt=ALL-UNNAMED -J--add-opens=java.desktop/java.awt.event=ALL-UNNAMED -J--add-opens=java.prefs/java.util.prefs=ALL-UNNAMED -J--add-opens=jdk.jshell/jdk.jshell=ALL-UNNAMED -J--add-modules=jdk.jshell -J--add-exports=java.desktop/sun.awt=ALL-UNNAMED -J--add-exports=java.desktop/java.awt.peer=ALL-UNNAMED -J--add-exports=java.desktop/com.sun.beans.editors=ALL-UNNAMED -J--add-exports=java.desktop/sun.swing=ALL-UNNAMED -J--add-exports=java.desktop/sun.awt.im=ALL-UNNAMED -J--add-exports=jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED -J--add-exports=java.management/sun.management=ALL-UNNAMED -J--add-exports=java.base/sun.reflect.annotation=ALL-UNNAMED -J--add-exports=jdk.javadoc/com.sun.tools.javadoc.main=ALL-UNNAMED -J-XX:+IgnoreUnrecognizedVMOptions"
# Default location of JDK:
# (set by installer or commented out if launcher should decide)
#
# It can be overridden on command line by using --jdkhome <dir>
# Be careful when changing jdkhome.
# There are two NetBeans launchers for Windows (32-bit and 64-bit) and
# installer points to one of those in the NetBeans application shortcut
# based on the Java version selected at installation time.
#
#netbeans_jdkhome="/path/to/jdk"
netbeans_jdkhome="/usr/lib/jvm/java-openjdk"
# Additional module clusters:
# using ${path.separator} (';' on Windows or ':' on Unix):
#
#netbeans_extraclusters="/absolute/path/to/cluster1:/absolute/path/to/cluster2"
