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Java Next()

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In this section, you will get the detailed explanation about the next() method of interface Iterator.

Java Next()

     

In this section, you will get the detailed explanation about the next() method of interface Iterator. We are going to use next() method of interface Iterator in Java. The description of the code is given below for the usage of the method.

Description of the code:

Here, you will get to know about the
next() method through the following java program. This method returns next element in the iteration in case the iteration has more than one element. This means that if the iteration has more than one element then the next() method will return the next element. However, if no more element exist then it throws NoSuchElementException.

In the program code given below, we have taken a string of elements. We have converted this string of elements into a list of array and then we have applied the hasNext() method first which will check if there is another element or not and if there exist another element then it will return that (next element) with the help of next() method. Hence we get the following output.

Here is the code of program:

import java.util.*;

public class next{
  public static void main (String args[]) {
  String elements[] {"Blue""Grey""Teal"};
  Set s = new HashSet(Arrays.asList(elements));
  Iterator i = s.iterator();
  while (i.hasNext()) {
  System.out.println(i.next());
  }
  }
  }

Output of the program:

C:\unique>javac next.java

C:\unique>java next
Blue
Grey
Teal

C:\unique>

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Posted on: March 3, 2008

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Comments
Flora
August 25, 2011
next()

How do I let user input data on more than 1 line...? without the programe exiting scanner when enter is press, this only has to happen when enter is pressed twice...
Ainee
November 28, 2011
Java

good material provid by u ..i like it
raj
August 20, 2012
to get by id

package test; import java.util.ArrayList; import java.util.Scanner; public class employee { public static void main(String[] args) { ArrayList list = new ArrayList(); list.add(new User(4356,"ajay" ,04-01-1990,127090) ); list.add(new User(657432,"sujit" ,14-06-1890,12300) ); list.add(new User(897654,"ramakant",14-07-1890,12800) ); list.add(new User(564322,"tom",01-21-1870,82600) ); System.out.print("Enter UserId: "); Scanner input=new Scanner(System.in); int UserId = input.nextInt(); for ( User s :list) { if(UserId == s.getUserId()) { System.out.println("UserName : " + s.getUserName()); System.out.println("UserDob: "+ s.getDob()); System.out.println("UserIncome: " +s.getIncome()); } } } }
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