IterateOverHashSetExample.java

importjava.util.HashSet;
importjava.util.Iterator;
importjava.util.Set;

publicclassIterateOverHashSetExample {
publicstaticvoidmain(String[] args) {
Set<String> programmingLanguages = newHashSet<>();
programmingLanguages.add("C");
programmingLanguages.add("C++");
programmingLanguages.add("Java");
programmingLanguages.add("Python");
programmingLanguages.add("PHP");
programmingLanguages.add("Ruby");

System.out.println("=== Iterate over a HashSet using Java 8 forEach and lambda ===");
programmingLanguages.forEach(programmingLanguage -> {
System.out.println(programmingLanguage);
 });

System.out.println("=== Iterate over a HashSet using iterator() ===");
Iterator<String> programmingLanguageIterator = programmingLanguages.iterator();
while (programmingLanguageIterator.hasNext()) {
StringprogrammingLanguage = programmingLanguageIterator.next();
System.out.println(programmingLanguage);
 }

System.out.println("=== Iterate over a HashSet using iterator() and Java 8 forEachRemaining() method ===");
programmingLanguageIterator = programmingLanguages.iterator();
programmingLanguageIterator.forEachRemaining(programmingLanguage -> {
System.out.println(programmingLanguage);
 });

System.out.println("=== Iterate over a HashSet using simple for-each loop ===");
for(StringprogrammingLanguage: programmingLanguages) {
System.out.println(programmingLanguage);
 }
 }
}