[Java]プロパティファイルが読み込めない

Question

###前提・実現したいこと
Javaでプロパティファイルの読み込み方について勉強しています。
ResourceBundleだと読み込めません。
アドバイスを頂ければうれしいです。

###発生している問題・エラーメッセージ
エラー画面です。

/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/bin/java "-javaagent:/Applications/IntelliJ IDEA CE.app/Contents/lib/idea_rt.jar=50123:/Applications/IntelliJ IDEA CE.app/Contents/bin" -Dfile.encoding=UTF-8 -classpath /Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/lib/tools.jar:/Users/tuba/java/20171208/out/production/20171208 SampleProperties
objc[10546]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/bin/java (0x10654d4c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x107db64e0). One of the two will be used. Which one is undefined.
password=abcd
Exception in thread "main" java.util.MissingResourceException: Can't find bundle for base name sample, locale en_US
	at java.util.ResourceBundle.throwMissingResourceException(ResourceBundle.java:1564)
	at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1387)
	at java.util.ResourceBundle.getBundle(ResourceBundle.java:773)
	at SampleProperties.main(SampleProperties.java:20)

Process finished with exit code 1

###該当のソースコード

import java.io.*;
import java.util.Properties;
import java.util.ResourceBundle;

public class SampleProperties {
    public static void main(String[] args) {
        Properties properties = new Properties();

        //プロパティファイルのパスを指定する
        String strpass = "./resources/sample.properties";

        try {
            InputStream istream = new FileInputStream(strpass);
            properties.load(istream);
            System.out.println("password="+properties.getProperty("password"));
        } catch (IOException e) {
            e.printStackTrace();
        }

        ResourceBundle resourceBundle = ResourceBundle.getBundle("sample");

        System.out.println("password="+resourceBundle.getString("password"));

    }
}

###試したこと
ファイルパスが問題だと考えています。
以下がディレクトリ構成です。

以下のサイトだと問題はなさそうなのですけれども・・・。
http://kikutaro777.hatenablog.com/entry/2014/02/18/231028

試しに以下のようなパスに変更しても駄目でした・・・。

###補足情報(言語/FW/ツール等のバージョンなど)
IDE：IntelliJ
OS：macOS Sierra
java:javac 1.8.0_101

Answer 1

プロパティファイルのパスを指定を指定しない場合は、.javaと同じ階層に置く。

import java.util.ResourceBundle;

public class SampleProperties {

    public static void main(String[] args) {

            ResourceBundle resourceBundle = ResourceBundle.getBundle("sample");
            System.out.println("password=" + resourceBundle.getString("password"));

     }
}

プロパティファイルのパスを指定を指定する場合はURLClassLoaderを使用する。

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Paths;
import java.util.Locale;
import java.util.ResourceBundle;

public class SampleProperties {

    public static void main(String[] args) {

        try {
            File dicDir = Paths.get(".\resources").toFile();
            URLClassLoader urlLoader;
            urlLoader = new URLClassLoader(new URL[]{dicDir.toURI().toURL()});

            ResourceBundle resourceBundle = ResourceBundle.getBundle("sample", Locale.getDefault(), urlLoader);

            System.out.println("password=" + resourceBundle.getString("password"));
        } catch (Exception e) {

        }
    }
}

sample.properties

password=12345

ではないかと。。。

Comments

[Yoshi-Koyama]

お返事が遅くなってすみません。
教えていただいた方法で実行できました！
ありがとうございました！！！