Simple Java TreeSet example
- /*
- Simple Java TreeSet example
- This simple Java Example shows how to use Java TreeSet. It also describes how to
- add something to TreeSet object using add method.
- */
- import java.util.TreeSet;;
- public class SimpleJavaTreeSetExample {
- public static void main(String[] args) {
- //create object of TreeSet
- TreeSet tSet = new TreeSet();
- /*
- Add an Object to TreeSet using
- boolean add(Object obj) method of Java TreeSet class.
- This method adds an element to TreeSet if it is not already present in TreeSet.
- It returns true if the element was added to TreeSet, false otherwise.
- */
- tSet.add(new Integer("1"));
- tSet.add(new Integer("2"));
- tSet.add(new Integer("3"));
- /*
- Please note that add method accepts Objects. Java Primitive values CAN NOT
- be added directly to TreeSet. It must be converted to corrosponding
- wrapper class first.
- */
- System.out.println("TreeSet contains.." + tSet);
- }
- }
- /*
- Output of the program would be
- TreeSet contains..[1, 2, 3]
- */
