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Write a Java Program to Iterate over a Set
PROGRAM: Java Program to Iterate over a Set
/*Java Program to Iterate over a Set*/
1: Iterate through Set using the forEach loop
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(“, “);
}
}
}
2: Iterate through Set using iterator()
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() + “, “);
}
}
}
3: Iterate through Set using forEach() method
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 + ” “);
});
}
}
