TreeSet - iterate using iterator, listIterator, Enumeration and enhanced for loop.
import java.util.Collections;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;
/** Copyright (c), AnkitMittal JavaMadeSoEasy.com */
public class TreeSetTest {
public static void main(String args[]) {
Set<String> treeSet=new TreeSet<String>();
treeSet.add("javaMadeSoEasy");
treeSet.add("ankit");
System.out.println("-------use iterator-------");
Iterator<String> iterator=treeSet.iterator();
while(iterator.hasNext()){
System.out.println(iterator.next());
}
System.out.println("-------use Enumeration-------");
Enumeration<String> listEnum=Collections.enumeration(treeSet);
while(listEnum.hasMoreElements()){
System.out.println(listEnum.nextElement());
}
System.out.println("-------use enhanced for loop-------");
for(String string:treeSet){
System.out.println(string);
}
}
}
/*OUTPUT
-------use iterator-------
ankit
javaMadeSoEasy
-------use Enumeration-------
ankit
javaMadeSoEasy
-------use enhanced for loop-------
ankit
javaMadeSoEasy
*/
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Collection programs
Core Java