Java Collection Tutorial - Java TreeMap.clear()

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Syntax

TreeMap.clear() has the following syntax.

public void clear()

Example

In the following code shows how to use TreeMap.clear() method.

import java.util.NavigableMap;
import java.util.TreeMap;
/*  ww w.  j a  v  a 2 s. c  o  m*/
public class Main {
   public static void main(String[] args) {
      
      NavigableMap<Integer, String>  treemap = new TreeMap<Integer, String> ();
      
      // populating tree map
      treemap.put(2, "two");
      treemap.put(1, "one");
      treemap.put(3, "three");
      treemap.put(6, "six");
      treemap.put(5, "from java2s.com");
      
      System.out.println("Entries in the Map: "+ treemap);
      
      // clearing the map
      System.out.println("Clearing the Map");              
      treemap.clear();
      
      System.out.println("Entries in the Map: "+ treemap);
   }    
}

The code above generates the following result.

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