Test case for showing issue of diacritic characters

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Add FooClient.java into src/main/java/org/test
Add module-info.java src/main/java
Add pom.xml in root folder

1) from root folder: $ mvn clean package
2) copy target/app.jar into root folder
3) change value of "-p": jdk-14.0.1\bin>$ jpackage --type app-image -n app -p "path of root folder" -m app/org.test.FooClient
4) $ cd app
5) $ app.exe testé testç testà

FooClient.java

package org.test;

import java.awt.BorderLayout;

import javax.swing.*;

public class FooClient {

    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(() -> {
            JFrame frame = new JFrame("Test non ascii chars through args");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            JPanel panel = new JPanel();
            BoxLayout boxLayout = new BoxLayout(panel, BoxLayout.Y_AXIS);
            panel.setLayout(boxLayout);
            
            for (int i = 0; i < args.length; i++) {
                JLabel jLabel = new JLabel(args[i]);
                panel.add(jLabel);
            }
            frame.getContentPane().add(panel, BorderLayout.CENTER);
            frame.pack();
            frame.toFront();
            frame.setVisible(true);
        });
    }
}

module-info.java

module app {
    requires java.desktop;
}

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>org.test</groupId>
	<artifactId>app</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<build>
		<plugins>

			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.8.0</version>
				<configuration>
					<release>14</release>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-jar-plugin</artifactId>
				<version>3.1.0</version>
				<configuration>
					<archive>
						<manifestEntries>
							<Main-Class>org.test.FooClient</Main-Class>
						</manifestEntries>
					</archive>
					<finalName>app</finalName>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>