Java TreeSet Examples
- Create TreeSet in Java Example
- How to Create a TreeSet and Add New Elements to It
- Java TreeSet add(), first() and last() Method Example
- Remove First and Last Element from TreeSet in Java
- Remove Element from TreeSet in Java Example
- Remove All Elements from Java TreeSet Example
- Check If an Element Exists in Java TreeSet Example
- Iterating over a TreeSet using Java 8 forEach() Method
- Iterate over a TreeSet using Iterator in Java Example
- Iterate over TreeSet in Java Example
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This Java example shows how to create a simpleTreeSetin Java with an example. This example also performs the following operations onTreeSet:
- Add elements to TreeSet usingadd() method
- Get the first element from TreeSet usingfirst() method
- Get last element from TreeSet usinglast() method
packagecom.javaguides.collections.treesetexamples;importjava.util.Comparator;importjava.util.SortedSet;importjava.util.TreeSet;publicclassCreateTreeSetExample {publicstaticvoidmain(String[]args) {// Creating a TreeSetSortedSet<String> fruits=newTreeSet<>();// Adding new elements to a TreeSet fruits.add("Banana"); fruits.add("Apple"); fruits.add("Pineapple"); fruits.add("Orange");// Returns the first (lowest) element currently in this set.String first= fruits.first();System.out.println("First element :"+ first);// Returns the last (highest) element currently in this set.String last= fruits.last();System.out.println("Last element :"+ last);// Returns the comparator used to order the elements in this set, or// null if this set uses the natural ordering of its elements.Comparator<?> comparator= fruits.comparator();SortedSet<String> tailSet= fruits.tailSet("Orange");System.out.println("tailSet :"+ tailSet); }}
Output
First element : AppleLast element : PineappletailSet :[Orange, Pineapple]
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