Cursors in java collection - quipoin.pptx

In Java mainly two types of cursors: Iterator and List Iterator.
Both are pre-defined Interfaces present in java.util package.
Iterator and List Iterator are used to traverse a group of objects.
List Iterator is used to traverse objects either in a forward direction or in a backward direction. i.e. bi-directional cursor.

1. Cursors in Java collection cursors in Java

2. Overview In Java mainly two types of cursors: Iterator and List Iterator. Both are pre-defined Interfaces present in java.util package. Iterator and List Iterator are used to traverse a group of objects. List Iterator is used to traverse objects either in a forward direction or in a backward direction. i.e. bi-directional cursor.

3. Program import java.util.ArrayList ; import java.util.Iterator ; public class Test { public static void main(String[] args ) { ArrayList aList =new ArrayList <>(); aList.add (10); aList.add ("Praveen"); aList.add (15.50); aList.add (21); Iterator i = aList.iterator (); while( i.hasNext ()) { System.out.println ( i.next ()); } System.out.println ("-------------------------------"); System.out.println ("List before remove:\n"+ aList ); System.out.println ("-------------------------------"); aList.remove (2);//Index 2 value is 12.20 System.out.println ("List after remove:\n"+ aList ); } }

4. Output: 10 Praveen 15.5 21 ------------------------------- List before remove: [10, Praveen, 15.5, 21] ------------------------------- List after remove: [10, Praveen, 21]