Friday, August 21, 2009

Java : Iterating ArrayList

Program to Iterate ArrayList, You can iterate ArrayList of String, Integer, Double, Long, Byte, Character etc.

1st Method simple standard way to iterate.
2nd Method using for each loop.


/* IterateArrayList.java */

import java.util.ArrayList;

public class IterateArrayList
{
public static void main(String[] args)
{
ArrayList<Integer> data = new ArrayList<Integer>();

for (int i=0;i<10 ;i++ )
{
//Java 5 supports Autoboxing (int added in Arraylist)
data.add(i);
}

System.out.println("Iterateing using 1st Method");

//Iterating ArrayList
for (int i=0;i<data.size() ;i++ )
{
System.out.println(data.get(i));
}


System.out.println("Iterateing using 2st Method");

//Iterating using for each loop
for(Integer val : data)
{
System.out.println(val);
}
}
}


/********OUTPUT********/
Iterateing using 1st Method
0
1
2
3
4
5
6
7
8
9
Iterateing using 2st Method
0
1
2
3
4
5
6
7
8
9

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