Algorithm

  1. Create a Set:

    • Declare a Set variable of the desired type (e.g., HashSet, TreeSet) and instantiate it.

  2. Add Elements to the Set:

    • Use the add method to populate the Set with elements.

  3. Iterator Initialization:

    • Obtain an iterator for the Set using the iterator method.

  4. Iterate Over the Set:

    • Use a loop (for, while, or enhanced for loop) to iterate through the Set.
    • Check if there are more elements using the hasNext method of the iterator.

  5. Retrieve Elements:

    • Use the next method of the iterator to get the current element in the iteration.

  6. Process Each Element:

    • Perform the desired operations or actions on each element during the iteration.

 

Code Examples

#1 Code Example- Iterate through Set using the forEach loop

Code - Java Programming

import java.util.Set;
import java.util.HashSet;


class Main {
  public static void main(String[] args) {
    // Creating an set
    Set < String> languages = new HashSet<>();
    languages.add("Java");
    languages.add("JavaScript");
    languages.add("Python");
    System.out.println("Set: " + languages);

    // Using forEach loop
    System.out.println("Iterating over Set using for-each loop:");
    for(String language : languages) {
      System.out.print(language);
      System.out.print(", ");
    }
  }
}
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Output

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Set: [Java, JavaScript, Python]`
Iterating over Set using for-each loop:
Java, JavaScript, Python,

#2 Code Example- Iterate through Set using iterator()

Code - Java Programming

import java.util.Set;
import java.util.HashSet;
import java.util.Iterator;

class Main {
  public static void main(String[] args) {
    // Creating an Set
    Set < Integer> numbers = new HashSet<>();
    numbers.add(1);
    numbers.add(3);
    numbers.add(2);
    System.out.println("Set: " + numbers);

    // Creating an instance of Iterator
    Iterator < Integer> iterate = numbers.iterator();
    System.out.println("Iterating over Set:");
    while(iterate.hasNext()) {
      System.out.print(iterate.next() + ", ");
    }
  }
}
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Output

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Set: [1, 2, 3]
Iterating over Set:
1, 2, 3,

#3 Code Example- Iterate through Set using forEach() method

Code - Java Programming

import java.util.Set;
import java.util.HashSet;

class Main {
  public static void main(String[] args) {
    // create an Set
    Set < Integer> numbers = new HashSet<>();

    // add elements to the HashSet
    numbers.add(1);
    numbers.add(2);
    numbers.add(3);
    numbers.add(4);
    System.out.println("Set: " + numbers);

    // iterate each element of the set
    System.out.print("Element of Set: ");

    // access each element using forEach() method
    // pass lambda expression to forEach()
    numbers.forEach((e) -> {
      System.out.print(e + " ");
    });
  }
}
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Output

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Set: [1, 2, 3, 4]
Element of Set: 1 2 3 4
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Demonstration

Java Programing Example to Iterate over a Set-DevsEnv