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computeifabsent hashmap java

Xenophobic Xenomorph answered on May 25, 2020 Popularity 9/10 Helpfulness 1/10

answer computeifabsent hashmap java

computeifabsent hashmap java

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import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class Test {
    public static void main(String[] s) {
        Map<String, Boolean> whoLetDogsOut = new ConcurrentHashMap<>();
        whoLetDogsOut.computeIfAbsent("snoop", k -> f(k));
        whoLetDogsOut.computeIfAbsent("snoop", k -> f(k));
    }
    static boolean f(String s) {
        System.out.println("creating a value for \""+s+'"');
        return s.isEmpty();
    }
}

Popularity 9/10 Helpfulness 1/10 Language java

Source: stackoverflow.com

Tags: hashmap java

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