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CopyOnWriteArraySet in Java
A thread safe version of the set is the CopyOnWriteArraySet in Java. This set uses an CopyOnWriteArrayList internally for the set operations. The CopyOnWriteArraySet was introduced by the JDK 1.5.
A program that demonstrates this is given as follows −
Example
import java.util.concurrent.*;
public class Demo extends Thread {
public static void main(String[] args) {
CopyOnWriteArraySet cowArraySet = new CopyOnWriteArraySet();
cowArraySet.add("Amy");
cowArraySet.add("John");
cowArraySet.add("Bob");
cowArraySet.add("Clara");
cowArraySet.add("Peter");
System.out.println(cowArraySet);
}
}The output of the above program is as follows −
Output
[Amy, John, Bob, Clara, Peter]
Now let us understand the above program.
The CopyOnWriteArraySet is created and then elements are added to it. Then the elements are displayed. A code snippet that demonstrates this is given as follows −
CopyOnWriteArraySet cowArraySet = new CopyOnWriteArraySet();
cowArraySet.add("Amy");
cowArraySet.add("John");
cowArraySet.add("Bob");
cowArraySet.add("Clara");
cowArraySet.add("Peter");
System.out.println(cowArraySet);
Updated on: 30-Jul-2019
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