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Basic Java example program to replace an element at specified index arraylist

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instanceof java

Posts: 576
Nickname: instanceof
Registered: Jan, 2015

instanceof java is a java related one.
Basic Java example program to replace an element at specified index arraylist Posted: Mar 9, 2016 10:50 PM
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This post originated from an RSS feed registered with Java Buzz by instanceof java.
Original Post: Basic Java example program to replace an element at specified index arraylist
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1.Basic java Example program to replace an element at specified index java arrayList.

  1. package com.instanceofjavaforus;
  2. import java.util.ArrayList;
  3.  
  4. public class ReplaceArrayList{
  5.  
  6. public static void main(String[] args) {
  7.   
  8. //create an ArrayList object
  9.  ArrayList<Integer> arrayList = new ArrayList<Integer>();
  10.        
  11.         //Add elements to Arraylist
  12.         arrayList.add(1);
  13.         arrayList.add(2);
  14.         arrayList.add(3);
  15.         arrayList.add(4);
  16.         arrayList.add(5);
  17.         arrayList.add(6);
  18.         arrayList.add(7);
  19.         arrayList.add(8);
  20.         arrayList.add(9);
  21.         arrayList.add(10);
  22.         
  23.  
  24.   /*
  25.   To replace an element at the specified index of ArrayList use
  26.   Object set(int index, Object obj) method.
  27.   This Object set(int index, Object obj) method replaces the specified element at the specified
  28.   index in the ArrayList and returns the element previously at the specified position.
  29.   */
  30.  
  31.  arrayList.set(1,23);
  32.      
  33.  System.out.println("ArrayList contains...");
  34.  Iterator itr=arrayList.iterator();
  35.  
  36. while (itr.hasNext()) {
  37.  
  38.  System.out.println(itr.next());
  39.  
  40.  }
  41.   
  42. }
  43. }
     



Output:

  1. ArrayList contains...
  2. 1
  3. 23
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10

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