CopyOnWriteArraySet remove() method in Java

The remove() method of CopyOnWriteArraySet removes the specified element if it is present in the set.

Syntax:

public boolean remove(Object o)

Parameters: The function accepts a mandatory parameter o which specifies the element to be removed from the set if present.

Return Value: The function returns true if set contains the specified element.

Below programs illustrate the above function:

Program 1:

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// Java Program to illustrate the
// remove() method in Java
  
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create object of CopyOnWriteArraySet
        CopyOnWriteArraySet<Integer> ArrSet
            = new CopyOnWriteArraySet<Integer>();
  
        // Add elements
        ArrSet.add(32);
        ArrSet.add(67);
        ArrSet.add(98);
        ArrSet.add(100);
  
        // print CopyOnWriteArraySet
        System.out.println("CopyOnWriteArraySet: "
                           + ArrSet);
  
        // Remove using remove() function
        if (ArrSet.remove(100))
            System.out.println("Set after removal"
                               + " of 100 is: "
                               + ArrSet);
        else
            System.out.println("100 is not present");
    }
}

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Output:

CopyOnWriteArraySet: [32, 67, 98, 100]
Set after removal of 100 is: [32, 67, 98]

Program 2:

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// Java Program to illustrate the
// isEmpty() method in Java
  
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create object of CopyOnWriteArraySet
        CopyOnWriteArraySet<String> ArrSet
            = new CopyOnWriteArraySet<String>();
  
        // Add elements
        ArrSet.add("gopal");
        ArrSet.add("geeks");
        ArrSet.add("geeks");
        ArrSet.add("technical");
  
        // print CopyOnWriteArraySet
        System.out.println("CopyOnWriteArraySet: "
                           + ArrSet);
  
        // Remove using remove() function
        if (ArrSet.remove("scripter"))
            System.out.println("Set after removal"
                               + " of 'scripter' is: "
                               + ArrSet);
        else
            System.out.println("'scripter' is not present");
    }
}

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Output:

CopyOnWriteArraySet: [gopal, geeks, technical]
'scripter' is not present

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArraySet.html#remove-java.lang.Object-



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