11:08 am - Tuesday October 24, 2017

clear all elements from treemap void Clear()

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            This tutorial explains how to clear all elements from treemap using Clear() method.

we can’t clear the particular data, it will clear all the data.

Example :

import java.util.TreeMap;

public class TreeMapClear

{

        public static void main(String a[])

    {

        TreeMap<String, String> hm = new TreeMap<String, String>();

        hm.put(“first”, “FIRST INSERTED”);

        hm.put(“second”, “SECOND INSERTED”);

        hm.put(“third”,”THIRD INSERTED”);

        System.out.println(hm);

        System.out.println(“Value of second: “+hm.get(“second”));

        System.out.println(“Is TreeMap empty? “+hm.isEmpty());

        hm.clear();

        System.out.println(hm);

      }

}

Output :

{first=FIRST INSERTED, second=SECOND INSERTED, third=THIRD INSERTED}

Value of second: SECOND INSERTED

Is TreeMap empty? false

            {}

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Filed in: Java Examples

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