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Remove specified element from Java TreeSet example

  1. /*
  2.   Remove specified element from Java TreeSet example
  3.   This Java Example shows how to remove a specified object or element
  4.   contained in Java TreeSet object using remove method.
  5. */
  6.  
  7. import java.util.TreeSet;
  8.  
  9. public class RemoveSpecifiedElementFromTreeSetExample {
  10.  
  11.   public static void main(String[] args) {
  12.  
  13.     //create object of TreeSet
  14.     TreeSet tSet = new TreeSet();
  15.    
  16.     //add elements to TreeSet object
  17.     tSet.add(new Integer("1"));
  18.     tSet.add(new Integer("2"));
  19.     tSet.add(new Integer("3"));
  20.    
  21.     System.out.println("TreeSet before removal : " + tSet);
  22.    
  23.     /*
  24.       To remove an element from Java TreeSet object use,
  25.       boolean remove(Object o) method.
  26.       This method removes an element from TreeSet if it is present and returns
  27.       true. Otherwise remove method returns false.
  28.     */
  29.    
  30.     boolean blnRemoved = tSet.remove(new Integer("2"));
  31.     System.out.println("Was 2 removed from TreeSet ? " + blnRemoved);
  32.    
  33.     System.out.println("TreeSet after removal : " + tSet);
  34.   }
  35. }
  36.  
  37. /*
  38. Output would be
  39. TreeSet before removal : [1, 2, 3]
  40. Was 2 removed from TreeSet ? true
  41. TreeSet after removal : [1, 3]
  42. */