How to move specific item in array list to the first item in Java?

Java 8 Object Oriented Programming Programming

To move an item from an ArrayList and add it to the first position you need to -

Get the position (index) of the item using the indexOf() method of the ArrayList class.
Remove it using the remove() method of the ArrayList class.
Finally, add it to the index 0 using the add() method of the ArrayList class.

Example

import java.util.ArrayList;

public class ArrayListSample {
   public static void main(String args[]) {
      ArrayList al = new ArrayList();
      al.add("JavaFX");
      al.add("HBase");
      al.add("WebGL");
      al.add("OpenCV");
      System.out.println(al);
      String item = "WebGL";
      int itemPos = al.indexOf(item);
      al.remove(itemPos);
      al.add(0, item );
      System.out.println(al);
   }
}

Output

[JavaFX, HBase, WebGL, OpenCV]
[WebGL, JavaFX, HBase, OpenCV]

Sharon Christine

Published on 09-Jan-2018 05:19:17

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