Sheep count with Garbage Collector

Sheep.java

/*
  How to run
  $ javac Sheep.java && java Sheep -Xms1k -Xmx1k -XX:MaxPermSize=1k -XX:MaxNewSize=1k

  Sample output
  양(id=35994) is created
  양(id=35995) is created
  양(id=35996) is created
  양(id=17679) is killed, current alive 양 14956마리
  양(id=35997) is created
  양(id=17678) is killed, current alive 양 14967마리
  양(id=17677) is killed, current alive 양 14967마리
  양(id=17676) is killed, current alive 양 14966마리
  양(id=17675) is killed, current alive 양 14965마리
 */

class Sheep {
  private static long nextId = 0;
  private static long aliveCounter = 0;
  
  private long id;
  public Sheep() {
    aliveCounter += 1;
    nextId += 1;
    this.id = nextId;
    String msg = String.format("양(id=%d) is created", this.id);
    System.out.println(msg);
  }
  
  @Override
  protected void finalize() throws Throwable {
    aliveCounter -= 1;
    String msg = String.format("양(id=%d) is killed, current alive 양 %d마리", this.id, aliveCounter);
    System.out.println(msg);
    super.finalize();
  }
  
  public static void main(String[] args) {
    for(int i = 0 ; i < 100000 ; ++i) {
      new Sheep();
    }
  }
}

https://twitter.com/if1live/status/670583486651076608