previous( ) method of ListIterator Interface in java.

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

previous( ) method of ListIterator Interface in java.

In the following example we will show you how can previous( ) method is implemented in ListIterator interface.

Syntax

public Object 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.

Parameter description

This method takes no argument.

Example of previous( ) method

In this example we will show you how does previous( ) method work in a collection using ListIterator interface. This example will help you to understand how can you find the element in backward direction into a collection. Through this example we will show you how previous( ) method uses ListIterator object and how it displays a new value from list sequentially, one element at a time. 

Example:-

package Devmanuals.com;
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());
  }
}

Output : 

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