Java - Set the initial value for thread-local variable

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Introduction

initialValue() method sets the initial value of the thread-local variable for each thread.

You can set the initial value for the call counter to 1000 by using an anonymous class as shown: 

ThreadLocal<Integer> threadLocal = new ThreadLocal<Integer>() {
    @Override
    public Integer initialValue() {
            return 1000;
    }
};

You can use a factory method called withInitial() in the ThreadLocal class that can specify an initial value. 

// Create a ThreadLocal with an initial value of 1000
ThreadLocal<Integer> threadLocal = ThreadLocal.withInitial(() -> 1000);

Return the second of the current time as the initial value 

ThreadLocal<Integer> threadLocal = 
         ThreadLocal.withInitial(() -> LocalTime.now().getSecond());

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