Java Collection Tutorial - Java NavigableMap.lowerKey(K key)

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Syntax

NavigableMap.lowerKey(K key) has the following syntax.

K lowerKey(K key)

Example

In the following code shows how to use NavigableMap.lowerKey(K key) method.

import java.util.NavigableMap;
import java.util.TreeMap;
//from  www.j  a v a 2  s  . c  o m
public class Main {
  public static void main(String args[]) {
    
    NavigableMap<String, String> nav = new TreeMap<String, String>();
    nav.put("A", "a");
    nav.put("B", "b");
    nav.put("C", "c");
    nav.put("D", "d");
    nav.put("E", "e");
    nav.put("F", "f");
    System.out.println(nav);
    System.out.println(nav.lowerKey("G"));
  }
}

The code above generates the following result.

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