Remove all elements from Java HashSet : HashSet « Collections Data Structure « Java

Home Java 1. 2D Graphics GUI 2. 3D 3. Advanced Graphics 4. Ant 5. Apache Common 6. Chart 7. Class 8. Collections Data Structure 9. Data Type 10. Database SQL JDBC 11. Design Pattern 12. Development Class 13. EJB3 14. Email 15. Event 16. File Input Output 17. Game 18. Generics 19. GWT 20. Hibernate 21. I18N 22. J2EE 23. J2ME 24. JDK 6 25. JNDI LDAP 26. JPA 27. JSP 28. JSTL 29. Language Basics 30. Network Protocol 31. PDF RTF 32. Reflection 33. Regular Expressions 34. Scripting 35. Security 36. Servlets 37. Spring 38. Swing Components 39. Swing JFC 40. SWT JFace Eclipse 41. Threads 42. Tiny Application 43. Velocity 44. Web Services SOA 45. XML

Java » Collections Data Structure » HashSet Screenshots  Remove all elements from Java HashSet        import java.util.HashSet; public class Main {   public static void main(String[] args) {     HashSet<Integer> hSet = new HashSet<Integer>();     hSet.add(new Integer("1"));     hSet.add(new Integer("2"));     hSet.add(new Integer("3"));     System.out.println(hSet);     hSet.clear();     System.out.println(hSet);     System.out.println(hSet.isEmpty());   } } /* [1, 2, 3] [] true */                                 Related examples in the same category 1. Add values to HashSet 2. HashSet implementation of set 3. Generic collection conversion: HashSet and ArrayList 4. Remove one set from another set 5. Remove element from HashSet 6. Find maximum element of Java HashSet 7. Find Minimum element of Java HashSet 8. Get Enumeration over Java HashSet 9. Get Synchronized Set from Java HashSet 10. Check if a particular element exists in Java HashSet 11. Copy all elements of Java HashSet to an Object Array 12. Get Size of Java HashSet 13. Iterate through elements of Java HashSet 14. Integer value set 15. Listing the Elements of a Collection(iterate over the elements of set or list) 16. Remove specified element from Java HashSet 17. Convert array to Set 18. Implements a HashSet where the objects given are stored in weak references 19. Convert an ArrayList to HashSet 20. Create an array containing the elements in a set 21. Duplicate elements are discarded 22. Convert Set into array 23. A memory-efficient hash set. 24. Compact HashSet 25. Coarse-grained hash set. 26. Concurrent hash set that allows the lock array to be resized. 27. A CompactHashSet implements the set interface more tightly in memory and more efficiently than Java's java.util.HashSet. 28. Concurrent HashSet