How to terminate Thread in Java If thread is waiting input?

I know Thread.stop() is deprecated and interrupt() or a way to use inner variable should be used.
However, https://stackoverflow.com/a/10962613/3809427 says "InputStream/OutputStream which are not interruptable" and I think thread waiting input can’t be terminated by a way using inner variable. Following is an example.

Thread labelThread = Thread.ofVirtual().unstarted(() -> {
        try {
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        }
    });
labelThread.start();
System.out.println("start");
Thread.sleep(3000);
labelThread.interrupt();
Thread.sleep(1000);
System.out.println(labelThread.isInterrupted());
System.out.println(labelThread.isAlive());

Output is following if you don’t input any.

start
isInterrupted= true
isAlive= true

If you input any(e.g. ‘a’), thread is terminated.

start
a
isInterrupted= true
isAlive= false

Actual process I want to terminate is inputReader() of external app and above is simplified code.

In these cases, stop() is only way to terminate thread? I can’t completely understand following answer but stop() gives a negative impact on entire system, not only thread even if thread is as simple as above?

java – Thread.stop() – deprecated – Stack Overflow

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