FULL PRODUCT VERSION :
java version "1.8.0_172-ea"
Java(TM) SE Runtime Environment (build 1.8.0_172-ea-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.172-b03, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]


EXTRA RELEVANT SYSTEM CONFIGURATION :
Web browser:
- Firefox 58.0.2 (64bit)
- Chrome 64.0.3282.186（Official Build） （64bit)
- InternetExplorer10


A DESCRIPTION OF THE PROBLEM :
By using web browser, .jnlp file can be launched, but passed argument string is not correctly encoded.


REGRESSION. Last worked in version 8u152

ADDITIONAL REGRESSION INFORMATION:
Uninstall 8u161 or later and re-install 8u152 or prior to reproduce the working test case.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Launch utf8.jnlp from web browsers.
Designate utf8.jnlp file from URL (such as file:// scheme) form can also reproduce.



REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
utf8.jnlp

Following argument attribute has UTF-8 encoded japanese letters as value.
<argument>--downloadFiles[0]=DownloadManagerSetupxxxxxxxxxxxxxxxxxxxxxxxxxx.exe</argument>

-------------utf8.jnlp begin ---------------
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.7+"
codebase="http://127.0.0.1:9000/">
<information>
<title>SilverBulletDownloadClient</title>
<vendor>Skeed Co. Ltd.</vendor>
<homepage href="http://www.skeed.co.jp" />
<description kind="one-line">SkeedSilverBullet Client</description>
<description kind="short">SkeedSilverBullet Client</description>
<description kind="tooltip">SkeedSilverBullet Client</description>
<icon kind="default" href="http://127.0.0.1:9000/public/images/ssb_transparent.gif" />
<icon kind="splash" href="http://127.0.0.1:9000/public/images/ssb_splash.jpg" />
<offline-allowed/>
</information>
<security>
<all-permissions />
</security>
<resources>
<java version="1.7+" initial-heap-size="8M" max-heap-size="64M"/>
<jar href="http://127.0.0.1:9000/public/jars/ssb_guic.jar"/>
<property name="jnlp.packEnabled" value="true" />
</resources>
<application-desc main-class="com.skeedtech.skeed_silver_bullet.simple_gui_client.SimpleDownloaderMain">

<argument>--downloadFiles[0]=DownloadManagerSetup - コピー - コピー (2) - コピー.exe</argument>

</application-desc>
</jnlp>
--------------utf8.jnlp end--------------

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Using older java or
limit functionality and/or change behavior of application.