Java Collection Tutorial - Java TreeMap.remove(Object key)


TreeMap.remove(Object key) has the following syntax.

public V remove(Object key)


In the following code shows how to use TreeMap.remove(Object key) method.

import java.util.TreeMap;
/*from  ww  2s .co m*/
public class Main {
   public static void main(String[] args) {
      TreeMap<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");      
      System.out.println("Value before modification: "+ treemap);
      // removing value at key 5
      System.out.println("Removed value: "+treemap.remove(5));
      System.out.println("Value after modification: "+ treemap);

The code above generates the following result.