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Java basics

previous()


This method gives previous element (Object) in the list. In this method, you can find the previous element by iteration, one element at a time from the list. This method is repeatable it may be called repeatedly to iterate through the list in backward direction. The previous( ) method can be combined with next( ) to go backward and forward. This method is used with ListIterator object. It gives the previous value till a collection has more elements. If a collection does not contain more elements, it displays 'NoSuchElementException' exception.

Syntax:
public Object previous( )


Example:

import java.util.List;
import java.util.LinkedList;
import java.util.ListIterator;
public class ListIteratorPrevious {
  public static void main(String[] args) {
    LinkedList llist = new LinkedList();
    llist.add("A");
    llist.add("B");
    llist.add("C");
    llist.add("D");
    llist.add("E");
    System.out.println("Elements of list = " + llist);
    System.out.println("Size of list = " + llist.size());
    ListIterator litr = llist.listIterator();
     while(litr.hasNext())
       litr.next();
     System.out.println("Elements in reverse order : ");
    System.out.println(litr.previous());
    System.out.println(litr.previous());
    System.out.println(litr.previous());
    System.out.println(litr.previous());
    System.out.println(litr.previous());
    // For next line the previous( ) method will throws exception
    System.out.println("\t-------------THROWS EXCEPTION------------- ");
    System.out.println(litr.previous());
  }

}


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