Java Thread - 如何使用ConcurrentHashMap computeIfPresent方法

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import java.util.LinkedHashMap;
import java.util.Map;
public class Main {
  public static void main(String[] args) {
    Map<String, Integer> wordCounts = new LinkedHashMap<String, Integer>();
    String s = "Lorem ipsum dolor sit amet consetetur iam nonumy sadipscing "
        + "elitr, sed diam nonumy eirmod tempor invidunt ut erat sed "
        + "labore et dolore magna dolor sit amet aliquyam erat sed diam";
    wordCounts.put("sed", 0);
    wordCounts.put("erat", 0);
    for (String t : s.split(" ")) {
      wordCounts.computeIfPresent(t, (k, v) -> v + 1);
    }
    System.out.println(wordCounts);
  }
}
 
 
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