“How to remove element from arraylist in java” Code Answer

How to remove element from arraylist in java

java by Nutty Newt on Dec 01 2020 Donate

// java program on ArrayList remove(int index) method example
import java.util.ArrayList;
import java.util.List;
public class ArrayListRemoveIndex
{
   public static void main(String[] args)
   {
      List<Integer> al = new ArrayList<>();
      al.add(56);
      al.add(28);
      al.add(39);
      al.add(59);
      al.add(82);
      System.out.println("Before using ArrayList.remove(int index) method: " + al);
      // removes element 28
      al.remove(1);
      // element 39 is now moved one position back
      // So element 39 is removed
      al.remove(1);
      System.out.println("After using ArrayList.remove(int index) method: " + al);
   }
}

Source: www.flowerbrackets.com

How to remove element from arraylist in java

java by Nutty Newt on Dec 01 2020 Donate

// how to remove element from arraylist in java while iterating
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class ArrayListWhileIterating
{
   public static void main(String[] args)
   {
      List<String> fruits = new ArrayList<>();
      fruits.add("grapes");
      fruits.add("pineapple");
      fruits.add("apple");
      fruits.add("mango");
      fruits.add("banana");
      fruits.add("orange");
      // before removing any element
      System.out.println("Before - remove element from arraylist while iterating: ");
      System.out.println(fruits);
      Iterator<String> itr = fruits.iterator();
      while(itr.hasNext())
      {
         String strFruit = itr.next();
         if(strFruit.equals("apple"))
         {
            itr.remove();
         }
      }
      // after removing an element
      System.out.println("After - remove element from arraylist while iterating: ");
      System.out.println(fruits);
   }
}

Source: www.flowerbrackets.com

How to remove element from arraylist in java

java by Nutty Newt on Dec 01 2020 Donate

// Java.util.ArrayList.remove(Object) method example
import java.util.ArrayList;
import java.util.List;
public class ArrayListRemoveObjectMethod
{
   public static void main(String[] args)
   {
      List<Integer> al = new ArrayList<>();
      al.add(56);
      al.add(28);
      al.add(39);
      al.add(59);
      al.add(82);
      System.out.println("Before using ArrayList.remove(Object) method size of ArrayList: " + al);
      // removes element 56
      al.remove(new Integer(56));
      // removes element 28
      al.remove(new Integer(28));
      System.out.println("After using ArrayList.remove(Object) method size of ArrayList: " + al);
   }
}

Source: www.flowerbrackets.com

How to remove element from arraylist in java

java by Nutty Newt on Dec 01 2020 Donate

// how to remove all elements from arraylist in java
import java.util.ArrayList;
public class RemoveAllElements
{
   public static void main(String[] args)
   {
      ArrayList<String> fruits = new ArrayList<>();
      fruits.add("pineapple");
      fruits.add("orange");
      fruits.add("apple");
      fruits.add("banana");
      fruits.add("watermelon");
      System.out.println("ArrayList before using clear() method: ");
      System.out.println(fruits);
      // empty an ArrayList using clear() method
      fruits.clear();
      System.out.println("ArrayList after using clear() method: ");
      System.out.println(fruits);
      ArrayList<String> colors = new ArrayList<>();
      colors.add("red");
      colors.add("blue");
      colors.add("green");
      colors.add("white");
      System.out.println("ArrayList before using removeAll() method: ");
      System.out.println(colors);
      // empty an ArrayList using removeAll() method
      colors.removeAll(colors);
      System.out.println("ArrayList after using removeAll() method: ");
      System.out.println(colors);
   }
}

Source: www.flowerbrackets.com