Java TreeSet iterator() Method

The iterator() method of TreeSet class is used to get the elements in the increasing/ascending order from the Set.

Syntax:

Return:

It returns an iterator of elements in increasing order.

Example 1

import java.util.*;
public class JavaTreeSetIteratorExample1
{
  public static void main(String as[]){
  TreeSet <Integer>obj = new TreeSet<Integer>();
  obj.add(2);	
  obj.add(8);
  obj.add(5);
  obj.add(1);
  obj.add(10);
  Iterator It_obj;
  It_obj = obj.iterator(); 
  while (It_obj.hasNext())
  {
  System.out.println("TreeSet Element : " +It_obj.next());
  }
}
}

Output:

TreeSet Element: 1
TreeSet Element : 2
TreeSet Element : 5
TreeSet Element : 8
TreeSet Element : 10

Example 2

import java.util.*;
public class JavaTreeSetIteratorExample2
{
  public static void main(String as[]){
  TreeSet <String> obj = new TreeSet<String>();
  obj.add("B");	
  obj.add("b");
  obj.add("A");
  obj.add("a");
 Iterator It_obj;
  It_obj = obj.iterator(); 
  while (It_obj.hasNext())
  {
  System.out.println("TreeSet Element : " +It_obj.next());
  }
  }
}

Output:

TreeSet Element : A
TreeSet Element : B
TreeSet Element : a
TreeSet Element : b

Example 3

import java.util.*;
public class JavaTreeSetIteratorExample3
{
  public static void main(String as[]){
  TreeSet <String> obj = new TreeSet<String>();
  TreeSet <Integer> obj1 = new TreeSet<Integer>();
  obj.add("B");	
  obj.add("b");
  obj.add("A");
  obj.add("a");
  obj1.add(2);
  obj1.add(3);
  obj1.add(4);
  obj1.add(1);
  Iterator It_obj, It_obj1;
  It_obj = obj.iterator();
  It_obj1 = obj1.iterator();
  while (It_obj.hasNext() && It_obj1.hasNext())
  {
  System.out.println("TreeSet: " +It_obj.next()+" "+It_obj1.next());
  }
}
}

Output:

TreeSet: A 1
TreeSet: B 2
TreeSet: a 3
TreeSet: b 4

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Java TreeSet iterator() Method

Syntax:

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Example 1

Example 2

Example 3

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Java TreeSet iterator() Method

Syntax:

Return:

Example 1

Example 2

Example 3

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