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CollectionsCode.java
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CollectionsCode.java
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import java.util.Set;
import java.util.HashSet;
import java.util.List;
import java.util.ArrayList;
import java.util.Collection;
import java.util.ListIterator;
public class HelloWorld
{
public static void main(String []args)
{
Set <String>mySet = new HashSet<String>();
mySet.add("first string");
mySet.add("second string");
mySet.add("third string");
mySet.add("first string");
for (String s: mySet) System.out.println(s);
List <String>myList = new ArrayList<String>();
myList.add("first string");
myList.add("second string");
myList.add("third string");
myList.add(0, "new first string");
myList.add("second string");
System.out.println("--------------------");
for (ListIterator <String>it = myList.listIterator(); it.hasNext();)
System.out.println(it.next());
System.out.println("--------------------");
for (ListIterator <String>it = myList.listIterator(myList.size()); it.hasPrevious();)
System.out.println(it.previous());
}
}