Get lowest and highest key stored in Java TreeMap - Java Collection Framework

Java examples for Collection Framework:TreeMap

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Description

Get lowest and highest key stored in Java TreeMap

Demo Code

 
import java.util.TreeMap;
 
public class Main {
 
  public static void main(String[] args) {
    TreeMap treeMap = new TreeMap();

    treeMap.put("1","One");
    treeMap.put("3","Three");
    treeMap.put("2","Two");
    treeMap.put("5","Five");
    treeMap.put("4","Four");
   //from w  w  w  . ja va  2  s . c o m
    System.out.println("Lowest key Stored in Java TreeMap is : " + treeMap.firstKey());

  }
}

Result


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