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Java basics

TreeSet


TreeSet provides an implementation of the Set interface that uses a tree for storage. Objects are stored in sorted, ascending order. Access and retrieval times are quite fast, which makes TreeSet an excellent choice when storing large amounts of sorted information that must be found quickly.

Syntax:
TreeSet ts = new TreeSet();


Example:

import java.util.*;

public class TreeSetDemo {

   public static void main(String args[]) {
      // Create a tree set
      TreeSet ts = new TreeSet();
      // Add elements to the tree set
      ts.add("C");
      ts.add("A");
      ts.add("B");
      ts.add("E");
      ts.add("F");
      ts.add("D");
      System.out.println(ts);
   }
}


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