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// lowlevel/SerialNumbers.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

public class SerialNumbers {

private volatile int serialNumber = 0;

public int nextSerialNumber() {

return serialNumber++; // Not thread-safe

}

}