Java 1.8 compatibility issue in FirefoxProfile.java

[BorisOsipov]

💥 Regression Report

java.lang.NoSuchMethodError: java.io.FileWriter.<init>(Ljava/io/File;Ljava/nio/charset/Charset;) on jdk-1.8.0_231 due usage public FileWriter(File file, Charset charset) costructor that @since 11 - avaliable only on jdk 11. See https://github.com/SeleniumHQ/selenium/blame/trunk/java/client/src/org/openqa/selenium/firefox/FirefoxProfile.java#L251

Will selenium 4 support jdk 1.8? I didn't find any info.

Last working Selenium version

Worked up to version:
selenium-firefox-driver:4.0.0-alpha-6

Stopped working in version:
selenium-firefox-driver:4.0.0-alpha-7

Stacktrace

java.io.FileWriter.<init>(Ljava/io/File;Ljava/nio/charset/Charset;)V
java.lang.NoSuchMethodError: java.io.FileWriter.<init>(Ljava/io/File;Ljava/nio/charset/Charset;)V
	at org.openqa.selenium.firefox.FirefoxProfile.updateUserPrefs(FirefoxProfile.java:251)
	at org.openqa.selenium.firefox.FirefoxProfile.layoutOnDisk(FirefoxProfile.java:376)
	at org.openqa.selenium.firefox.FirefoxProfile.toJson(FirefoxProfile.java:326)
	at org.openqa.selenium.firefox.FirefoxOptions.asMap(FirefoxOptions.java:296)
	at org.openqa.selenium.MutableCapabilities.merge(MutableCapabilities.java:83)
	at org.openqa.selenium.remote.DesiredCapabilities.merge(DesiredCapabilities.java:107)

Environment

Language Bindings version: selenium-firefox-driver:4.0.0-alpha-7

[BorisOsipov]

Also selenium-grid:4.0.0-alpha-7

java.util.Optional.isEmpty()Z
java.lang.NoSuchMethodError: java.util.Optional.isEmpty()Z
	at org.openqa.selenium.grid.docker.DockerOptions.isEnabled(DockerOptions.java:98)
	at org.openqa.selenium.grid.docker.DockerOptions.getDockerSessionFactories(DockerOptions.java:113)
	at org.openqa.selenium.grid.node.local.LocalNodeFactory.create(LocalNodeFactory.java:69)
	at org.openqa.selenium.grid.commands.Standalone.createHandlers(Standalone.java:195)
	at org.openqa.selenium.grid.TemplateGridServerCommand.asServer(TemplateGridServerCommand.java:41)
	at org.openqa.selenium.grid.commands.Standalone.execute(Standalone.java:206)
	at org.openqa.selenium.grid.TemplateGridCommand.lambda$configure$2(TemplateGridCommand.java:98)
	at org.openqa.selenium.grid.Main.launch(Main.java:154)
	at org.openqa.selenium.grid.Main.go(Main.java:88)
	at org.openqa.selenium.grid.Main.main(Main.java:54)

Optional.isEmpty() is 11 api

[diemol]

Thank you for reporting this, it was an honest mistake where some Java 11 bits went through.

We want to support Java 11 or higher in the future, but we have not made any decision yet on when and how to do that. So far, we will still support Java 8.
We will probably spend some time figuring out the Java versions support after Selenium 4 is released.