How to Browse an ArrayList in Java

The Journey of an ArrayList in Java  is done with 3 loops:
  • The for
  • The while or do loop.. while
  • The Iterator loop
Let's take a look at the example below where we have implemented the 3 methods mentioned.

import java.util.ArrayList; 
import java.util.Iterator; 

public class parcours {

 public static void main(String[] args) {
 
 ArrayList list = new ArrayList(); 

 list.add(12); 
 list.add(26); 
 list.add(18); 
 
 System.out.println("Loop for"); 
 for(int i = 0 ; i < list.size(); i++)
 System.out.println(list.get(i)); 
 
 System.out.println("Advanced for Loop"); 
 for(Integer n : list)
 System.out.println(n); 
 
 System.out.println("Loop while"); 
 int i = 0; 
 while(i it=list.iterator(); 
 while(it.hasNext())
 System.out.println(it.next()); 
 }
}
Runtime:

Loop for
12
26
18
Loop for advanced
12
26
18
 while
12
26
18
do-while
12
26
18
Iterator
12
26
18

How to Browse an ArrayList Using the Enumeration

import java.util.ArrayList; 
import java.util.Collections; 
import java.util.Enumeration; 

public class parcours {

 public static void main(String[] args) {
 
 ArrayList list = new ArrayList(); 

 list.add("aaa"); 
 list.add("bbb"); 
 list.add("ccc"); 

 // retrieve the Enumerationin
 Enumeration enumeration = Collections.enumeration(list); 
 
 // enumerate through the list
 while(enumeration.hasMoreElements())
 System.out.println(enumeration.nextElement()); 
 }
}
Runtime:

aaa
bbb
ccc