Get lowest and highest key stored in Java TreeMap example
- /*
- Get lowest and highest key stored in Java TreeMap example
- This Java Example shows how to get the lowest and highest key stored in the java
- TreeMap object using firstKey and lastKey methods of java TreeMap class.
- */
- import java.util.TreeMap;
- public class GetLowestHighestKeyTreeMapExample {
- public static void main(String[] args) {
- //create TreeMap object
- TreeMap treeMap = new TreeMap();
- //add key value pairs to TreeMap
- treeMap.put("1","One");
- treeMap.put("3","Three");
- treeMap.put("2","Two");
- treeMap.put("5","Five");
- treeMap.put("4","Four");
- /*
- To get the lowest key currently stored in Java TreeMap use,
- Object firstKey() method of TreeMap class.
- This method returns the first or lowest key currently stored in the
- TreeMap object.
- */
- System.out.println("Lowest key Stored in Java TreeMap is : "
- + treeMap.firstKey());
- /*
- To get the highest key currently stored in Java TreeMap use,
- Object lastKey() method of TreeMap class.
- This method returns the last or highest key currently stored in the
- TreeMap object.
- */
- System.out.println("Highest key Stored in Java TreeMap is : "
- + treeMap.lastKey());
- }
- }
- /*
- Output would be
- Lowest key Stored in Java TreeMap is : 1
- Highest key Stored in Java TreeMap is : 5
- */
