Answer Posted / qim2010

Using HashSet class we can eliminate duplicates from and
array. Here is a simple example

public class ArrayRemoveDuplicate {
public static void main(String[] args) {
//
// A string array with duplicate values
//
String[] data = {"A", "C", "B", "D", "A", "B", "E",
"D", "B", "C"};
System.out.println("Original array : " +
Arrays.toString(data));

//
// Convert it to list as we need the list object to
create a set object.
// A set is a collection object that cannot have a
duplicate values, so
// by converting the array to a set the duplicate
value will be removed.
//
List<String> list = Arrays.asList(data);
Set<String> set = new HashSet<String>(list);

System.out.print("Remove duplicate result: ");

//
// Create an array to convert the Set back to array.
The Set.toArray()
// method copy the value in the set to the defined
array.
//
String[] result = new String[set.size()];
set.toArray(result);
for (String s : result) {
System.out.print(s + ", ");
}
}
}

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