I'm confused by a java code in the CPU.getClock() method [closed]

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I came across some code in Java earlier. I'm not a Java developer, so I got a little lost. The result of this is passed in a URL. I need this result, but how would I do it in another language like JavaScript?

This is the piece of code:

String clock = CPU.getClock(this, TextUtils.join("", arrayList2).getBytes(Charset.forName("UTF-8")), 0);