import java.util.HashSet;
public class CopyAllElementsToArray {
public static void main(String[] args) {
// TODO Auto-generated method stub
HashSet hSet = new HashSet();
hSet.add(new Integer("1"));
hSet.add(new Integer("2"));
hSet.add(new Integer("3"));
Object[] objArray = hSet.toArray();
for(int index=0; index < objArray.length ; index++)
System.out.println(objArray[index]);
}
}
Console：
1
2
3
