What is the Hashset.removeall() Method in Java?

The Hashset.removeall() method takes as its first argument the hash set being operated on, and each subsequent parameter is a tuple containing the key and value to be deleted. The HashSet.remove() method takes no parameters, but results in changing the size of a set with respect to one or more given keys.

HashSet removeAll() method in java

Nutty Newt on Oct 28, 2020

example on removeAll() method for NullPointerException
import java.util.HashSet;
public class HashSetRemoveAllMethodExample
{
   public static void main(String[] args)
   {
      try
      {
         HashSet<Integer> hs1 = new HashSet<Integer>();
         hs1.add(2);
         hs1.add(4);
         hs1.add(6);
         hs1.add(8);
         hs1.add(10);
         // printing hs1
         System.out.println("HashSet before using removeAll() method: " + hs1);
         // create another object of HashSet
         HashSet<Integer> hs2 = null;
         // printing hs2
         System.out.println("Elements to be removed: " + hs2);
         System.out.println("Trying to pass null: ");
         // removing elements from HashSet
         // specified in hs2 using removeAll() method
         hs1.removeAll(hs2);
         System.out.println("HashSet after using removeAll() method: " + hs1);
      }
      catch(NullPointerException ex)
      {
         System.out.println("Exception: " + ex);
      }
   }
}

Source: www.flowerbrackets.com

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-1

HashSet removeAll() method in java

Nutty Newt on Oct 28, 2020

import java.util.HashSet;
public class HashSetRemoveAllMethodExample
{
   public static void main(String[] args)
   {
      try
      {
         HashSet<Integer> hs1 = new HashSet<Integer>();
         hs1.add(2);
         hs1.add(4);
         hs1.add(6);
         hs1.add(8);
         hs1.add(10);
         System.out.println("HashSet before using removeAll() method: " + hs1);
         // create another HashSet
         HashSet<Integer> hs2 = new HashSet<Integer>();
         hs2.add(2);
         hs2.add(4);
         hs2.add(6);
         System.out.println("Elements to be removed: " + hs2);
         // remove elements from hs1 described in hs2 using removeAll() method
         hs1.removeAll(hs2);
         System.out.println("HashSet after using removeAll() method: " + hs1);
      }
      catch(NullPointerException ex)
      {
         System.out.println("Exception: " + ex);
      }
   }
}

Source: www.flowerbrackets.com

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-1

The Hashset.removeall() method removes all elements that are not in the set. It returns true if any element was removed and false otherwise.

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What is the Hashset.removeall() Method in Java?

HashSet removeAll() method in java

HashSet removeAll() method in java

Java answers related to "HashSet removeAll() method in java"

Java queries related to "HashSet removeAll() method in java"

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