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Saturday, July 10, 2010

Convert an Array into an ArrayList in Java

To convert an Array into an java.util.ArrayList we can use the java.util.Arrays class's asList method. The following code example demonstrates converting an Array of Strings to an ArrayList of Strings.

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

/**
* Java 1.4+ Compatible 

* The following example code demonstrates converting an Array of Strings to an ArrayList of Strings
*/
public class Array2ArrayList {

public static void main(String[] args) {

// initialize array with some data
String[] sa = new String[] { "A", "B", "C" };
// convert array to ArrayList
ArrayList al = new ArrayList(Arrays.asList(sa));

// iterate over each element in ArrayList
Iterator iterator = al.iterator();
while (iterator.hasNext()) {
// Print element to console
System.out.println((String) iterator.next());
}
}
}



Here is the output of the example code:
A
B
C

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