Wednesday, August 3, 2011

Remove all elements from Java ArrayList

package org.best.example;
   
/*
      Remove all elements from Java ArrayList Example
      This Java Example shows how to remove all elements from java ArrayList object
      using clear method.
    */
    
    import java.util.ArrayList;
    
    public class RemoveAllElementsOfArrayListExample {
    
    public static void main(String[] args) {
    //create an ArrayList object
    ArrayList arrayList = new ArrayList();
    
    //Add elements to Arraylist
    arrayList.add("1");
    arrayList.add("2");
    arrayList.add("3");
    
    System.out.println("Size of ArrayList before removing elements : "
    + arrayList.size());
    /*
      To remove all elements from the ArrayList use
      void clear() method.
      */
    arrayList.clear();
    System.out.println("Size of ArrayList after removing elements : "
    + arrayList.size());
    
    }
    }
    /*
    Output would be
    Size of ArrayList before removing elements : 3
    Size of ArrayList after removing elements : 0
    */

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